William Holmes (British Army medical officer)

William Holmes (1762–1834), M.D., J.P., was Surgeon-General to the British Forces in Canada; a magistrate and landowner at Quebec.

Born at Stewartstown, County Tyrone. He was the son of William Holmes (d.1789) of Bray Island, Donaghmore, County Tyrone; formerly a Captain in the 4th (The King's Own) Regiment of Foot. His mother, Martha Stewart (1732–1805), was the daughter of Rev. Robert Stewart (1687–1746) of Gortnaglush, Co. Tyrone; Minister of Carland and "a man of considerable property". Robert Stewart was a grandson of Colonel Robert Stewart, of Irry and a first cousin of Andrew Stewart of Stuart Hall, Stewartstown, County Tyrone, de jure 7th Baron Castle Stewart.

His mother's first cousin, George Stewart (grandfather of Field Marshal Sir George Stuart White), served as Surgeon-General of the British Forces in Ireland, and later President of the Royal College of Surgeons in Ireland. Under the auspices of this relation Holmes entered the medical department of the British army in 1787, stating that 'as was customary in those days I paid 400 guineas' for a commission. As Staff Surgeon to the 5th Regiment of Foot he was immediately posted to Quebec. From 1790 to 1791 he was in Detroit tending wounded Indians who had fought against the Americans, under Little Turtle and Blue Jacket.

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