There is a theory that the name Sasaki was changed from the ancestor's name, Misasagi no He, but in Nihonshoki (Chronicles of Japan) it was written that 'Sasakiyama gimi Karafukuro no Sukune' helped the Emperor Yuryaku to murder Prince Oshiha and was therefore demoted to the humble rank of Ryoko instead of receiving the death penalty and was transferred under Yamabe no muraji after being deprived of any title; however, because 'Okime no Omina' from his family confessed to where the remains of the Prince Oshiha were placed, 'Yamato Fukuro no Sukune', who was the brother of Okime no Omina, was given the name Sasakiyama gimi in place of Karafukuro no Sukune.
祖先は陵戸(みささぎのへ)で沙沙貴(ささき)の名前も陵戸が変化した物と言う説があるが、日本書紀には「狭々城山君韓袋宿裲」（ささきやまぎみからふくろのすくね）が雄略天皇による押磐皇子謀殺に荷担したために罰せられ、死刑とする代わりに身分を落とし賤民である陵戸とされ全ての官籍を剥奪の上で山部連の下に置かれたが、同族の「置目老嫗」（おきめのおみな）が押磐皇子の遺骨の所在を知らせた功により置目老嫗の兄である「倭袋宿裲」が韓袋宿裲に代わり狭々城山君の姓を賜ったとある。