[3] Kildare studied for a time at Christ Church, Oxford, and in his eighteenth year married Joan, fourth daughter of Lord Cork.
He appears to have been much under the influence of that astute adventurer; but occasional differences occurred between them, for the settlement of which the intervention of the lord deputy, Wentworth, was obtained.
Kildare sat for the first time in the Irish House of Lords, in 1634, and was appointed colonel of a foot regiment in the English army in Ireland.
"[4] In January 1646 Kildare and the Ulick Burke, 1st Marquess of Clanricarde became sureties to the extent of £10,000 each for the Edward Somerset, Earl of Glamorgan, on the occasion of his liberation from prison at Dublin.
In a subsequent petition to the chief justice of Munster Kildare stated that during eleven years he and his family had been driven to great extremities and endured much hardship in England and Ireland through his constant adherence and faithful affection to the parliament of England; that he was then, for debt, under restraint in London, and had despatched his wife and some of his servants to Ireland in hopes to raise a considerable sum out of his estate for his enlargement and subsistence.