Clarification of the Transmission Chain to Yusuf Ibn yaʿqub

And whatever is narrated from Yusuf ibn Yaʿqub, I have narrated it from my father - may Allah (swt) have mercy on him - from Saʿd ibn Abdullah, from Muhammad ibn ʿIsa ibn Ubayd, from Muhammad ibn Sinan, from Yusuf ibn Yaʿqub, the brother of Yunus ibn Yaʿqub, and they were both Faṭhis.