Notes:

WILLIAM, fifth Earl of Menteith, had a gift from the Crown on 10 April 1565 of his own ward and marriage,* and he entered into a contract with his mother by which she advanced the money paid for the gift, and drew the rents of the earldom until the sum was refunded. He was under age at his father's death, and had not been infeft in the earldom, but he was publicly acknowledged as Earl, and sat as such in the Commission of Parliament at Stirling, which, on 29 July 1567, received Queen Mary's demission, and assisted at the coronation of the infant Prince James. He fought against the Queen at the battle of Langside, and took part in meetings of Privy Council and Parliament up to July 1569. He was still under age, but obtained, on 28 October 1571, a dispensation from the Crown, upon which, on 20 November same year, he was infeft in the earldom of Menteith, the lands of Kilbride, and others.* He attained majority on or before 24 January 1572-73, when he ratified his marriage-contract made in his minority/ On 2 May 1574 he received a Commission of Justiciary against a number of marauders with Highland names, and was a member of the Privy Council until his death. His vassals and those of Leckie of that Ilk at this time quar- relled, and serious bloodshed took place, on account of which the principals on both sides were summoned before the Oouncil in May 1577, and in February and March 1577- 78 the Earl was bound over to keep good rule.
He, however, died a few months later, in September 1578, after an illness apparently of some duration, as he delivered his eldest son to the charge of George Buchanan of that Ilk, his brother-in-law, about ten days before his death, and left a will directing that the child should remain in Buchanan's charge.

William married Margaret (of Drumlanrig) Douglas about 16 May 1571. Margaret (daughter of Sir James (7th Baron of Drumlanrig) Douglas and Christian (of Eglington) Montgomerie) and died. [Group Sheet] [Family Chart]

1. John (6th Earl of Menteith) Graham died in Dec 1598.
2. George Graham was born before 1590; and died.

John + Marian Seton. Marian (daughter of George (4th Lord) Seton and Elizabeth (of Yester) Hay) and died. [Group Sheet] [Family Chart]

William married Margaret (of Barnbougle) Moubray before Jun 1521. Margaret (daughter of John (of Barnbougle) Moubray) and died. [Group Sheet] [Family Chart]

George married Elizabeth (of Yester) Hay about 15 Jun 1527. Elizabeth (daughter of John (of Yester) 3rd Lord Hay and Elizabeth (of Angus) Douglas) and died. [Group Sheet] [Family Chart]

Alexander + Margaret Buchanan. Margaret (daughter of Walter Buchanan of That Ilk 14th of Buchanan and Isabelle Graham) and died. [Group Sheet] [Family Chart]

Notes:

Walter Buchanan of that ilk, 14th of Buchanan (d 1526)
m. (before 26.11.1463) Isabelle Graham (dau of William Gr
aham, 2ndLord)

"The following were reported by 'Strathendrick' but not by BLG1952.
E. Margaret Buchanan
m. Alexander Graham, 2nd Earl of Menteith (d before 27.02.1536-7)
F. Elizabeth Buchanan
m. (1492) William Stirling, 11th of Cadder, 2nd of Lettyr (d 1517)
The following were reported by BLG1952 but not by 'Strathendrick'.
G. daughter
m. Lamond of Lamond
H. daughter
m. (22.06.1486) John Campbell of Ardkinglas (b c1460)"

From Stirnet Genealogy athttp://www.stirnet.com/HTML/genie/british/bb4fz/buchanan02.htm
Main sources:
(1) "Strathendrick and its Inhabitants from Early Times" by John GuthrieSmith, published in Glasgow in 1896
(2) BLG1952 (Murray-Buchanan of Leny).

George married Janet (of Bothwell) Hepburn before 25 Jan 1507. Janet (daughter of Patrick (1st Earl of Bothwell) Hepburn and Janet (of Morton) Douglas) died after 10 May 1558. [Group Sheet] [Family Chart]

John married Elizabeth (of Angus) Douglas before 17 Sep 1509. Elizabeth (daughter of George (Master of Angus) Douglas and Elizabeth Drummond) and died. [Group Sheet] [Family Chart]