Fitzwilliam, William, Earl, a politician of George the Third's time; the excesses of the French Revolution caused him to come over from the Whigs and support Pitt; favoured Catholic emancipation during his Lord-Lieutenancy of Ireland, but was recalled; held office under Grenville in 1806, and took some part in the Reform Bill agitation of the day (1748-1833).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Fitzroy, Robert * Fiume