 Henry was a grandson of Shane O'Neill ("Shane the Proud"), and his own grandson, Con (died 1723), has a headstone in the old Kilskeery graveyard.The Civil Survey of 1654 says that the remains of a village, church, burial ground and mill could still be seen at Old Trelic but, by then, the new town of Trillick had been built.After the Flight of the Earls from Lough Swilly on 4 September 1607, and the division of their escheated lands, the O’Neill territory here was given the description of the Manor of Stowy and allotted to Sir Mervyn Tuchet in 1611 during the Plantation of Ulster.