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Across the world, Адемар (Ademar , Adhemar , Adhémar ) is a common boy's first name. The forename Адемар is characteristic of Latin America and the Caribbean, particularly Brazil, where it is quite a common male name, Bolivia, and Costa Rica. Measured by absolute frequency, it most frequently occurs in Brazil, Bolivia, and Philippines. Much less frequently, Адемар is the last name as well as the forename.
Адемар is also a name for the fictitious and mythical characters: Adhemar de Monteil , the operatic character in the opera Jérusalem by Giuseppe Verdi; Papal Legate and Adhemar , the comics character.