Notes:

According to http://www.electricscotland.com/webclans/atoc/colquho2.html Alexander had by his wife Helen, daughter of Sir George Buchanan of that ilk, one son and five daughters. He died in 1617.

1 - "1593. May 8. Alexander Colquhoun of Luss besides finding caution conforme to the General Bond (i.e. Act of Parliament 1587.) Binds himself and others not to intercommune with any of the names of Buchanan, MacGregor, or MacFarlane. Robert Galbraith eventually comes under a similar Bond on the 20. May."
Without direct evidence against the Luss Tradition that the MacGregors were art and part with the Macfarlanes in the Raid of Bentoig, the above excerpts do not agree with the tone of rancour that might have been expected had there been a Blood Feud.
[ History of clan Gregor Vol 1 Chapt XIX ]

2 - Dec 23 1595
The king professed to be at this time scandalised at the state of the commonweal, 'altogether disorderit and shaken louss by reason of the deidly feids and controversies standing amangs his subjects of all degrees.' Seeing how murder had consequently become a daily occurrence, he resolved upon a new and vigorous effort to bring the hostile parties to a reconciliation 'by his awn pains and travel to that effect,' so that the country might be the better fitted to resist the common enemy, now threatening invasion. The Privy Council, therefore, ordained letters to be sent charging the various parties to make their appearance before the king on certain days, wherever he might be for the time, each accompanied by a certain number of friends who might assist with their advice, but the whole party in each case 'to keep their lodgings after their coming, while [till] they be specially sent for by his majesty.'
Alexander Lord Livingston, Sir Alexander Bruce, elder, of Airth, and Archibald Colquhoun of Luss, were one of the groups of protagonists summoned to appear before the King.
The nobles in every instance were allowed to have sixty, and the commoners twenty-four persons to accompany them to the place of agreement, and all, while attending, to have protection from any process of horning or excommunication which might have been previously passed upon them. Fire and sword was threatened against all neglecting to comply with the summons.
Earnest as the king seems now to have been, and influential as a royal tongue proverbially is, we know for certain that several of the parties now summoned continued afterwards at enmity.

3 - In Sir Alexander's time occurred the raid of Glenfinlas, and the bloody clan conflict of Glenfruin, between the Colquhouns and Macgregors, in December 1602 and February 1603, regarding which the popular accounts are much at variance with the historical facts. The Colquhouns had taken part in the execution of the letters of fire and sword issued by the crown against the Macgregors some years before, and the feud between them had been greatly aggravated by various acts of violence and aggression on both sides.
In 1602, the Macgregors made a regular raid on the laird of Luss's lands in Glenfinlas, and carried off a number of sheep and cattle, as well as slew several of the tenants. Alexander Colquhoun, who had before complained to the privy council against Earl of Argyll for not repressing the clan Gregor, but who had failed in obtaining any redress, now adopted a tragic method in order to excite the sympathy of the king. He appeared before his majesty at Stirling, accompanied by a number of females, the relatives of those who had been killed or wounded at Glenfinlas, each carrying the bloody shirt of her killed or wounded relative, to implore his majesty to avenge the wrongs done them. The ruse had the desired effect upon the king, who, from a sensitiveness of constitutional temperament, which made him shudder even at the sight of blood, was extremely susceptible to impressions from scenes of this description , and he immediately granted a commission of lieutenancy to the laird of Luss, investing him the power to repress similar crimes, and to apprehend the perpetrators.
"This commission granted to their enemy appears to have roused the lawless rage of the Macgregors, who rose in strong force to defy the laird of Luss; and Glenfruin, with its disasters and sanguinary defeat of the Colquhouns, and its ultimate terrible consequences to the victorious clan themselves, was the result".
In the beginning of the year 1603, Allaster Macgregor of Glenstrae, followed by four hundred men chiefly of his own clan, but including also some of the clans Cameron and Anverich, armed with "halberschois, powaixes, twa-handit swordies, bowis and arrowis, and with hagbutia and pistoletis", advanced into the territory of Luss. Colquhoun, acting under his royal commission, had raised a force which has been stated by some writers as having amounted to 300 horse and 500 foot. This is probably an exaggeration, but even if it is not, the disasters which befell them may be explained from the trap into which they fell, and from the nature of the ground on which they encountered the enemy. This divsted them of all the advantages which they might have derived from superiority of numbers and from their horse.
On the 7th February 1603, the Macgregors were in Glenfruin "in two diviions", writes Mr Fraser ? "One of them at the head of the glen, and the other in ambuscade near the farm of Strone, at a hollow or ravine called the Crate. The Colquhouns came into Glenfruin from the Luss side, which is opposite Strone ? probably byGlen Luss and Glen Mackurn. Alexander Colquhoun pushed on his forces in order to get through the glen before encountering the Macgregors; but, aware of his approach, Allaster Macgregor also pushed forward one division of his forces and entered at the head of the glen in time to prevent his enemy from emerging from the upper end of the glen, whilst his brother, John Macgregor, with the division of his clan, which lay in ambuscade, by a detour, took the rear of the Colquhouns, which prevented their retreat down the glen without fighting their way through that section of the Macgregors who had got in their rear. The success of the stratagem by which theColquhouns were thus placed between two fires seems to be the only way of accounting for the terrible slaughter of the Colquhouns and the much less loss of the Macgregors.
"The Colquhouns soon became unable to maintain their ground, and, falling into a moss at the farm of Auchingaich, they were thrown into disorder, and made a hasty and disorderly retreat, which proved even more disastrous than the conflict, for they had to force their way through the men led by John Macgregor, whilst they were pressed behind by Allaster, who, reuniting the two divisions of his army, continued the pursuit".
All who fell into the hands of the victors were at once put to death, and the chief of the Colquhouns barely escaped with his life after his horse had been killed under him. One hundred and forty of the Colquhouns were slaughtered, and many more were wounded, among whom were several women and children. When the pursuit ended, the work of spoliation and devastation commenced. Large numbers of horses, cattle, sheep, and goats were carried off, and many of the houses and steadings of the tenantry were burned to the ground. Their triumph the Macgregors were not allowed long to enjoy. The government took instant and severe measures against them. A price was put upon the heads of seventy or eighty of them by name, and upon a number of their confederates of other clans:- "Before any judicial inquiry was made", says Mr Fraser, "on 3d April 1603, only two days before James VI left Scotland for England to take possession of the English throne, an Act of Privy Council was passed, by which the name of Gregor or Macgregor was for ever abolished. All of this surname were commanded, under penalty of death, to change it for another; and the same penalty was denounced against those who should give food or shelter to any of the clan. All who had been at the conflict of Glenfruin, and at the spoliation and burning of the lands of the Laird of Luss, were prohibited, under the penalty of death, from carrying any weapon except a pointless knife to eat their meat". Thirty-five of the clan Gregor were executed after trial between the 20th May 1633 and the 2nd March 1604. Amongst these was Allaster Macgregor, who surrendered himself to the Earl of Argyll.
This chief, Sir Alexander, was the man who figures in the great contest with the MacGregors at Glenfruin. In his introduction to Rob Roy Sir Walter Scott lays the blame of beginning the feud upon the Colquhouns. His narrative runs, "Two of the MacGregors, being benighted, asked shelter in a house belonging to a dependent of the Colquhouns, and were refused. They then retired to an outhouse, took a wedder from the fold, killed it, and supped off the carcase, for which they offered payment to the owner. The Laird of Luss, however, unwilling to be propitiated by the offer made to his tenant, seized the offenders, and by the summmary process which feudal barons had at their command, caused them to be condemned and executed." Sir Walter adds that "the MacGregors verified this account of the feud by appealing to the proverb current among them, execrating the hour when the black wedder with the white tail was ever lambed." There is at the same time another and probably a truer account of the outbreak of the trouble. It would appear that the MacGregors were instigated to attack the Colquhouns by Archibald, Earl of Argyll, who had his own ends to serve by bringing trouble on both clans. As a result of the constant raids by the MacGregors, thus brought about, Sir Alexander Colquhoun in 1602 obtained a licence from James VI. to arm his clan. On the 7th of the following February the two clans, each some three hundred strong, came face to face in battle array in Glenfruin. The battle was so much a set affair that Alastair MacGregor divided his force into two parties, he himself attacking the Colquhouns in front, while his brother John came upon them in the rear. The Colquhouns defended themselves bravely, killing among others this John MacGregor; but, assailed on two sides, they were at last forced to give way. They were pursued to the gates of Rossdhu itself, and 140 of them were slain, including several near kinsmen of the chief and a number of burgesses of Dunbarton who had taken arms in his cause.
According to a well-known tradition, some forty students and other Dunbarton folk had come up to witness the battle. As a watch and guard MacGregor had set one of his clansmen, Dugald Ciar Mhor, over these spectators. On the Colquhouns being overthrown, MacGregor noticed Dugald join in the pursuit, and asked him what he had done with the young men, whereupon the clansman held up his bloody dirk, and answered, "Ask that!"
The MacGregors followed up the defeat of the Colquhouns by plundering and destroying the whole estate. They drove off 600 cattle, 800 sheep and goats, and 14 score horses, and burned every house and barnyard and destroyed the "Haill plenishing, guids, and gear of the four-score pound land of Luss," while the unfortunate chief, Sir Alexander Colquhoun, looked on helpless from within the walls of the old castle of Rossdhu, the ruin of which still stands on its rising ground behind the modern mansion.
Retribution, swift and terrible, however, was visited upon the MacGregors. Some sixty Colquhoun widows in deep mourning, carrying their husbands' bloody shirts on poles, appeared before James VI. at Stirling. It has been suggested that this parade was not all genuine, that these women were not all widows, and that the blood on the shirts had not been shed in Glenfruin. But the King was sufficiently moved, and forthwith letters of fire and sword were granted against the MacGregors. Their very name was proscribed and the sheltering of one of the clan was made a crime punishable with death. While his men were hunted with dogs along the hills, the chief, Alastair Gregor, was induced across the Border by the promise of his false friend, Argyll. The latter had given his word that he would see him safely into England, whither the King had by that time removed his court; but no sooner was MacGregor across the Border than Argyll had him arrested and carried back to Edinburgh, where on 20th January, with four of his henchmen, he was tried, condemned, and hanged at the Cross, while all his possessions were declared forfeited.
The emnity that followed this raid held until the end of the 18th century when the Chief of Colquhoun and the Chief of Clan Gregor shook hands in Glen Fruin the site of the former slaughter.

3 - Feb 9
This is the date of an outbreak of private warfare which throws all contemporary events of the same kind into the shade.
In pursuance of a quarrel of some standing between the Clan Gregor and Colquhoun, Laird of Luss, the former came in force to the banks of Loch Lomond. The parties met in Glenfruin, and the Colquhouns, out-marneuvred by the enemy, were overthrown. The Macgregors, besides killing a number of persons, variously stated at three score and four score, in the battle, are alleged to have murdered a number of prisoners (amongst whom, by the way, was Tobias Smollett, bailie of Dumbarton, very likely an ancestor of the novelist, his namesake), and also some poor unarmed people. The whole slaughter is set down at 140 persons. Besides all this, they carried off 600 cattle, 800 sheep and goats, fourteen score of horse and mares, 'with the haill plenishing, gudes and geir, of the four-score-pound land of Luss, burning and destroying everything else.' It has been alleged that they killed the laird after taking him prisoner, and murdered a number of school-boys from the college or school of Dumbarton; but these would appear to be groundless charges. Such as their guilt was, it proved the commencement of a long course of oppression and misery endured by this clan. According to a contemporary writer, a mournful procession came to Edinburgh, bearing eleven score of bloody shirts, to excite the indignation of the king against the Macgregors. There being no friend of the Macgregors present to plead their cause, letters of intercommuning were immediately issued against them.
The feeling of a state-officer of these days regarding the unruly population of the north, comes strongly out in a letter of the President Lord Fyvie, written to the king a few weeks after he had gone to London. 'Your majesty will understand by your Council's letters the estate and proceedings with the Macgregors. Gif all the great Highland clans war at the like point, I wald think it ane great ease and weel to this commonwealth, and to your majesty's guid subjects here.'
It was arranged soon after that a large number of the Clan Gregor should be deported from the country, but whither does not appear. The Privy Council requested the king to allow a ship to be sent for them, 'seeing all these wha are to depart, in whilk number the laird himself is ane, are . . . . unable of themselves aither to defray their charges, furnish themselves of victuals, or pay their fraught.'

Alexander married Helen (Margaret) Buchanan on 18 Aug 1595. Helen (daughter of George Buchanan and Margaret (Mary) Graham) was born in 1574 in Buchanan parish, Stirlingshire, Scotland; died in Luss, Dunbartonshire, Scotland. [Group Sheet] [Family Chart]

Notes:

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John married Agnes Boyd on 15 Nov 1564. Agnes (daughter of Robert 5th Baron Boyd and Margaret (of Glins) Colquhoun) and died. [Group Sheet] [Family Chart]

George + Margaret (Mary) Graham. Margaret and died. [Group Sheet] [Family Chart]

Humphrey married Katherine\Helen (of Montrose) Graham before 1515. Katherine\Helen (daughter of William (1st Earl of Montrose) Graham and Janet Edmonstone) and died. [Group Sheet] [Family Chart]

Robert married Margaret (of Glins) Colquhoun about 1535. Margaret (daughter of George (5th of The Glins) Colquhoun and Margaret Boyd) died in Aug 1601. [Group Sheet] [Family Chart]