Amadeus \a-ma-deus\ as a boy's name is pronounced ah-ma-DAY-us. It is of Latin origin, and the meaning of Amadeus is "God's love". A saint's name that became widely familiar as Wolfgang Mozart's middle name due to the 1984 movie "Amadeus", which dramatized the famed composer's life. Amadeo is the Spanish and Italian form.

Amadeus has 17 variant forms: Amadee, Amadei, Amadeo, Amado, Amadeusz, Amadi, Amadieu, Amadis, Amado, Amando, Amati, Amato, Amatus, Amedeo, Amadeusz, Amyas and Amyot.