Anseau is a masculine French given name. Notable holders include:
Anseau de Cayeux (fl. 1200–1247) Anseau of Garlande (1069–1118) (1265–1343), marshal of France (fl. 1209) (d. 1146) (d. 1188/9), who married a daughter of Guy of Bar-sur-Seine (fl. 1188–1208), who married a daughter of Erard II, Count of Brienne (d. 1239)