Fulcois II du Perche was born circa 1067 to Rotrou II du Perche (?-1080) and Adèle de Bellème (?-?) and died after 1078 of unspecified causes. Notable ancestors include Charlemagne (747-814). Ancestors are from France, Germany, Belgium.
Little is known about Fulk. His three older brothers were married, so chances are he took religious vows.