Sir George Hamilton, 1st Baronet ( – 1679), born in Scotland, inherited land in Ireland and fought in the Irish Army for the royalists under his brother-in-law James Butler, 1st Duke of Ormond during the Confederate Wars and the Cromwellian conquest of Ireland. He was father of Antoine Hamilton, author of the "Mémoires du comte de Grammont", of Richard Hamilton, Jacobite general, and of Elizabeth, Countess de Gramont, "la belle Hamilton".