Henry Hamilton-Moore, 3rd Earl of Drogheda PC (Ire) (died 7 June 1714) was an Anglo-Irish peer and soldier.
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Early life
He was born Henry Moore as a younger son of Henry Moore, 1st Earl of Drogheda (d. 1675) and Hon. Alice Spencer. His elder brother, Charles, married Lady Letitia Isabella Robartes (eldest daughter of 1st Earl of Radnor). Among his siblings were Hon. William Moore (who married Lady Elizabeth Brabazon, widow of the 3rd Earl of Meath and daughter of the 14th Lord Dacre and Elizabeth Bayning, suo jure Countess of Sheppey), Lady Alice Moore (wife of the 2nd Earl of Clanbrassil and the 2nd Lord Bargeny), and Lady Mary Moore (wife of the 3rd Earl of Dalhousie and the 2nd Lord Bellenden).
His paternal grandparents were Charles Moore, 2nd Viscount Moore of Drogheda, and the Hon. Alice Loftus (youngest daughter of the 1st Viscount Loftus). His uncle was Henry Spencer, 1st Earl of Sunderland, and his maternal grandparents were William Spencer, 2nd Baron Spencer and Lady Penelope Wriothesley (eldest daughter of the 3rd Earl of Southampton).
Career
Upon the death of his brother on 18 June 1679, he succeeded as the title of 3rd Earl of Drogheda, a title that had been created for his father in the Peerage of Ireland in 1661. He also succeeded to his family's subsidiary titles, as the 5th Baron Moore of Mellefont (which had been created for his great-grandfather, Garret Moore, in 1616) and the 5th Viscount Moore (created in 1622, also for his great-grandfather Garret). On the death of his sister, the Dowager Countess of Clanbrassil, who had devised upon him the Hamilton family estates in her will, he assumed the additional surname of Hamilton in 1677.
