相馬氏 Sōma clan

cadet branch of Chiba clan who descended from Kanmu Heishi.

• Sōma clan of Ōshū (奥州相馬氏) - head family.
• Sōma clan of Shimōsa (下総相馬氏) - cadet branch.

Cadet branches

• Hashimoto clan
• Izumi clan
• Okada clan