John Hamilton, 9th of Udstoun, was a great3-grandson of James and Janet (Hamilton) Muirhead.(
John Hamilton, 9th of Udstoun, married Elizabeth Brown. Elizabeth was a daughter of Robert Brown of Coalstoun. They gave birth to: Alexander, William, Margaret, and a couple other children, whose names have eluded historians.
Alexander Hamilton, son of John and Margaret Hamilton, married Elizabeth Cumming. She was a daughter of William Cumming. They gave birth to: William, and John. The son, William, made a claim to the title of ‘Lord Belhaven’ after the death of the 5th Lord, but his claim was rejected; he died on 19 January 1796.