Bross is a patronymic surname of German origin. The Latin name Ambrosius was popular in early Christian Germany primarily because of the fame of Saint Ambrose of Milan, whose name comes from the Greek Αμβροσιος (Ambrosios) which means “immortal” or “divine.” The portion of the etymology of Aμβρόσιος from which Bross comes is βροτός (Brotos) which means "mortal."
