Adhemar is both a given name and a surname. Notable people with the name include:
Given name
Adhemar of Salerno (died 861), prince
Adhemar of Capua (died after 1000), prince
Adhémar de Chabannes (988-1034), French monk and historian
Adhemar of Le Puy (died 1098), bishop
Adhémar Jori/Jory (1375), lord of Domeyrat près Carlat, François Adhémar de Monteil (1603–1689), Archbishop of Arles François Adhémar de Monteil, Comte de Grignan (1632–1714), French aristocrat Adhémar Jean Claude Barré de Saint-Venant (1797-1886), mechanician Louis-Alfred-Adhémar Rivet (1873-1951), politician Adhémar Raynault (1891-1984), politician Adhemar (footballer, born 1896), Adhemar dos Santos, Brazilian football midfielder Adhemar Pimenta (1896-1970), sports manager Adhemar de Chaunac (born 1896, fl. 1961), vintner Adhemar de Barros (1901-1969), mayor of São Paulo and Governor of São Paulo Adhemar da Silva (1927-2001), athlete Adhemar Bultheel (born 1948), Belgian mathematician Adhemar (footballer, born 1972), Adhemar Ferreira de Camargo Neto, Brazilian football forward
Surname
Joseph Adhemar (died 1862), mathematician
Fictional characters
Adhemar, Flemish comic book character in The Adventures of Nero by Marc Sleen. Count Adhemar, the main antagonist of A Knight's Tale, a medieval comedy starring Heath Ledger.