William Handcock, 1st Viscount Castlemaine, PC (Ire) (28 August 1761 – 7 January 1839) was an Irish MP and a supporter of the union of Ireland with Great Britain.
William Handcock, 1st Viscount Castlemaine, PC (Ire) (28 August 1761 – 7 January 1839) was an Irish MP and a supporter of the union of Ireland with Great Britain.