Some warriors were Minamoto clan on the paternal side and Taira clan on the maternal side, or vice versa, and there were some who had a hard time deciding, and even families that split in two to fight each other.
父系で見れば源氏だが、母系で見れば平氏、またはその逆という武将も少からずいて、去就に苦慮した者や、一族が2つに分かれて争った者もいる。