Another branch line family is the Saigo clan, and it is said that Saigo no tsubone, the biological mother of Hidetada TOKUGAWA, Seii Taishogun (literally, "great general who subdues the barbarians"), Yorihaha SAIGO, the chief retainer of the Aizu Domain and Takamori SAIGO, lower ranked feudal retainer of the Satsuma Domain, were from the Kikuchi family.
他に庶流として西郷氏があり、征夷大将軍徳川秀忠生母の西郷局、会津藩家老西郷頼母、薩摩藩下級藩士西郷隆盛は菊池氏の出とされる。