It is also thought that this inconsistency was due to the manipulation done to their genealogy records that put their origin as part of the Minamoto clan and the family lines of Tadamasa, Nobumoto, and Tadashige as the head of the family (the second volume of "The History of Kariya City").
また、出自を源氏とし、忠政－信元－忠重流を宗家とする系譜操作が行われたためとも言われる（『刈谷市史』2巻）。