Erard of Bar, (French: Érard de Bar) was a monk by 1292 and then seigneur de Pierrepont, Meurthe-et-Moselle et d'Ancerville by 1302.
Erard was one of eight sons born to Theobald II, Count of Bar[1] and his wife, Jeanne de Toucy.
He married Isabella of Lorraine (d. 12 December 1353),[1] daughter of Theobald II, Duke of Lorraine, and Isabelle de Rumigny; they had had six children.
Erard died in 1335 at Pierrepont, France.