William Caulfeild, 2nd Viscount Charlemont PC (c.1655 – 21 July 1726) was an Irish soldier and peer.
He was rewarded by William for his loyalty by being put in command of a regiment of infantry and created Custos Rotulorum of Tyrone and Armagh.
He took the regiment to Spain, taking part in the Siege of Barcelona and the attack on Fort Montjuïc in 1705.
Although contentiously removed from his command of the regiment, he was nevertheless promoted in 1707 to the rank of Major-General[2] and made Governor of Counties Armagh and Tyrone.
[5] In May 1726, he was made a Privy Counsellor but died in Dublin shortly afterwards and was buried in the vault of the family in Armagh.