noun
family crest; noble crest
Honorific term for a family crest, especially of a noble or samurai family. Used in respectful contexts.
この着物には家の御紋が入っています。
This kimono bears the family crest.
お墓に御紋が刻まれている。
The family crest is engraved on the gravestone.
家紋 is the standard, non-honorific term for a family crest. 御紋 adds an honorific prefix, making it more respectful.
Combination of honorific prefix 御 (ご) and 紋 (もん, 'crest').