Hakuseki ARAI wrote in his book that the Mon used in 'Kinugasa (蓋)' was the origin of Kamon, however, others claim that this was just heresy and the true origin remains inconclusive.
新井白石が「蓋（きぬがさ）」で用いられた紋も家紋の起こりであると自著で記しているが、この説には異説があり結論は出ていない。