Claud Hamilton, 4th Earl of Abercorn PC (Ire) (1659–1691) was a Scottish and Irish peer who fought for the Jacobites in the Williamite War.

Claud was born in 1659,[1] probably at Kenure House in Rush near Dublin, baptised at St. Audoen's Church as the eldest son of George Hamilton, and Elizabeth Fagan.

The family's usual residence was Kenure House in Rush near Dublin, where he and his siblings were probably born and where his father died.

When James arrived in Dublin and established his administration, Abercorn was appointed a member of the Jacobite Privy Council of Ireland and a Lord of the Bedchamber.

He raised a regiment of horse in Ireland for James,[14] and led it in Lord Mountcashel's expedition against Enniskillen in July 1689.

The cavalry on the right was showered with fleeing foot soldiers from the left wing and the centre, and came late into action or fled without a fight.

[27] His brother became the 5th Earl of Abercorn immediately as this title was in the peerage of Scotland and not affected by the Irish attainder.