Although the truth remains unknown due to the lack of historical sources, it was somewhat doubtful that Nukata no Okimi, who was a member of ozoku was granted the title Ason (also pronounced Asomi, granted to powerful families descended from the Imperial Family).
史料がないので真相は不明だが、王族のはずの額田王が朝臣姓を賜っている点はやや不審である。