Claud Hamilton married Mary Hamilton, the only child of Sir Robert Hamilton (died 1657), a knight, of Elieston in
County Tyrone. His wife's father was an undertaker in the
Plantation of Ulster and settled at Badoney, Barony Strabane, County Tyrone, which he renamed Ellieston. As there is a house called Ellieston near Edinburgh that once belonged to some Hamiltons, it might be that Mary's father had come from there. In this case, he would have been a Catholic. Claud Hamilton had no children with his first wife, but he inherited the Elieston manor (County Tyrone). == Second marriage ==