Moore, George Henry (1810–70) was born 1 March 1810 in Moore Hall, Ballyglass, Co. Mayo, the eldest of three sons born to Louisa Moore (née Browne), granddaughter of the 1st earl of Altamont and George Moore (1770–1840), landlowner and historian, the son of a wealthy merchant. In the rebellion year of 1798, an uncle, John Moore, was named "President of the Government of the Province of Connaught" in Castlebar by General Humbert during its brief occupation by the French.