Adonia \a-do-nia\ as a girl's name (also used as boy's name Adonia), is pronounced ah-DOHN-yah. It is of Greek origin, and the meaning of Adonia is "extremely good looking". Feminine form of Adonis. Greek mythology: Adonis was a young man so beautiful that Aphrodite, goddess of love, became enamored of him. The name Adonis has come to epitomize male beauty.