The Hojo clan, from which Kagetora had come, included Ujiyasu HOJO who is believed to have been Domanmaru's grandfather, Ujimasa HOJO, Ujikuni HOJO and Ujiteru HOJO who were Domanmaru's uncle.
景虎の実家である北条家の一族は、祖父と伝わる北条氏康、叔父に北条氏政、北条氏邦、北条氏照らがいる。