It is said that the Mon succeeding in the female line was created naturally because in the merchant families of the Kansai area the talented daughter's husband often inherited the family business.
関西の商家では外部から頻繁に有能な入婿を迎えて家を継がせる女系相続が行われたため、自然発生的に女系に伝わる紋が生まれたといわれる。