Richard FitzWilliam, 6th Viscount FitzWilliam

Richard FitzWilliam, 6th Viscount FitzWilliam, wearing the Star of the Order of the Bath. Portrait c.1744 by William Hoare. Fitzwilliam Museum, Cambridge
Arms of Fitwilliam: Lozengy argent and gules

Richard FitzWilliam, 6th Viscount FitzWilliam (24 July 1711 - 25 May 1776), KB, PC, FRS, of Mount Merrion, near Dublin, Ireland, was an Anglo-Irish peer and property developer.