In Ulster as well as in Leinster, the ascendency of the Earl of Kildare over the native population was widespread and long sustained. Con O'Neil, Lord of Tyrone, from 1483 to 1491, and Turlogh, Con and Art, his sons and successors (from 1498 to 1548), maintained the most intimate relations with this Earl and his successors. To the former he was brother-in-law, and to the latter, of course, uncle; to all he seems to have been strongly attached. Hugh Roe O'Donnell, Lord of Tyrconnell (1450-1505), and his son and successor, Hugh Dhu O'Donnell, (1505-1530), were also closely connected with Kildare both by friendship and intermarriage. In 1491, O'Neil and O'Donnell mutually submitted their disputes to his decision, at his Castle of Maynooth, and though he found it impossible to reconcile them at the moment, we find both of these houses cordially united with him afterwards. In 1498, he took Dungannon and Omagh, "with great guns," from the insurgents against the authority of his grandson, Turlogh O'Neil, and restored them to Turlogh; the next year he visited O'Donnell, and brought his son Henry to be fostered among the kindly Irish of Tyrconnell. In the year 1500 he also placed the Castle of Kinnaird in the custody of Turlogh O'Neil. In Leinster, the Geraldine interest was still more entirely bound up with that of the native population. His son, Sir Oliver of Killeigh, married an O'Conor of Offally; the daughter of another son, Sir James of Leixlip, (sometimes called the Knight of the Valley) became the wife of the chief of Imayle. The Earl of Ormond, and Ulick Burke of Clanrickarde, were also sons-in-law of the eighth Earl, but in both these cases the old family feuds survived in despite of the new family alliances.