In "The Shinsen Shojiroku" (Newly Compiled Register of Clan Names and Titles of Nobility), it appears to be that Junmushi is the ancestor of Fueto, and Junmushi seems to be the same person as Junmumishi.
別に『新撰姓氏録』には不破勝の祖先が淳武止であると見え、淳武止は淳武微子と同じと思われる。