also known as Yamauchi Sudō clan, descended from Fujiwara Hokke.
- Yamauchi clan of Bingo (備後山内氏) - head family.
- Yamauchi clan of Ōshū (奥州山内氏) - cadet branch.
- 土佐山内氏 Yamauchi clan of Tosa - cadet branch; famous for Yamauchi Kazutoyo.
Home province
- Bingo
- Tosa
Cadet branches
- Ōshū Yamauchi
- Tosa Yamauchi