Beaumanoir was a seigniory in what is now the department of Côtes-d'Armor, France, which gave its name to an illustrious family.
Philippe de Rémi (died 1265), French poet and bailiff
Philippe de Rémi (died 1296), French jurist and royal official
Jean de Beaumanoir (1310–1366/7), marshal of Brittany
Jean de Beaumanoir (marquis) (1551–1614), French seigneur, marshal and afterwards marquis de Lavardin
Lucas de Beaumanoir, fictional Grand Master of the Templars in Walter Scott's 1819 novel Ivanhoe