Érard II of Brienne (died 1191) was count of Brienne from 1161 to 1191, and a French general during the Third Crusade, most notably at the Siege of Acre.
[1] He was the son of Gautier II, count of Brienne (Gautier II de Brienne [fr]), and Humbeline Baudemont, daughter of Andrew, lord of Baudemont (André de Baudement [fr]) and Agnès of Braine.
[2] His paternal grandparents were Érard I, Count of Brienne and Alix de Roucy.
During this siege, he saw his brother André of Brienne die on 4 October 1189, before being killed himself on 8 February 1191.
Before 1166, he married Agnès of Montfaucon (Agnès de Montfaucon [fr]) († after 1186),[3] daughter of Amadeus II of Montfaucon and of Béatrice of Grandson-Joinville.