Girl name origins & meanings Greek : Regal; feminine form of Basil Girl name variations Basilissa Basilla Boy name origins & meanings Greek : RoyalArabic : Brave Boy name variations Basil Basilo Basilia Basia Vasilis Vasily Bazyli Family name origins & meanings Southern Italian : from a personal name derived from medieval Greek Basilis, a reduced form of Basileios (seeBasil).French : variant of Basil.