Garnet \g(a)-rnet, gar-net\ as a girl's name (also used as boy's name Garnet), is pronounced GAR-net. It is of Middle English origin. A dark red gemstone named for the pomegranate that the garnet crystals resemble. It is the birthstone for January. Garnet has 4 variant forms: Garnette, Granata, Grenata and Grenatta. Baby names that sound like Garnet are Caranda and Karenza.