Heim

Heim is one of the 12 Crusaders, possesses the title of Saint, is the original wielder of the Naga Tome, and is the founder of the country of Grandbell as well as the capital of Barhara. Heim's known blood descendents are: Azmur, Kurth, Diadora, Celice, Yuria, and surprisingly Yurius, but he obviously didn't inherit any Naga holy blood. It should be noted in Fire Emblem: Seisen no Keifu, his holy line is called Naga, but in Fire Emblem: Thracia 776 it is called Heim.