TAIRA no Tadamasa who was descended from the Taira clan and the Hattori clan were relatives and Nakane was an uncle of Masashige HATTORI (the fourth Hanzo HATTORI) who fell from power because of the involvement in Okubo Nagayasu Incident.
平氏の流れを汲む平忠正と服部氏は縁戚関係であり、中根は大久保長安事件に連座して失脚した服部正重（4代目服部半蔵）の叔父にあたる。