替かえ紋もん

noun

informal family crest; auxiliary crest

Archaic term for a secondary or informal family crest used in place of the formal one, often in less official settings.

• 江え戸ど時じ代だいには、武ぶ士しが略りゃく式しきの場ばで替かえ紋もんを用もちいることがあった。

  In the Edo period, samurai sometimes used an informal family crest on casual occasions.