4th son
4th Mate on Tristan, a mercant ship of the East India Company
Landowner in Jamaica
This may be the John Monteath who married (?as his second wife) Nancy, a former slave, and had by her Charlottte, John Wilson, James (eldest son) and Archibald John, a planter.
He appears to have left a widow 'Ann Monteith of St Elizabeth' who may have been a landowner.