However, since this would make him rule until at least the age of 110, modern historians commonly assume that Biryu was in fact the son or grandson of Saban's younger brother.
Namun sejak hal ini akan membuatnya memerintah paling sedikit sampai ia berusia 110 tahun, sejarawan modern umumnya menganggap bahwa Biryu sebenarnya adalah putra atau cucu adik lelaki Saban.