William Henry Lawrence Peter Wentworth-Fitzwilliam, 8th Earl Fitzwilliam, DSO (31 December 1910 – 13 May 1948), styled Viscount Milton before 1943, was a British soldier, nobleman, and peer, with a seat in the House of Lords.

William Wentworth-Fitzwilliam, 4th Earl Fitzwilliam, PC (30 May 1748 – 8 February 1833), styled Viscount Milton until 1756, was a British Whig statesman of the late 18th and early 19th centuries.