I love your mon, and it inspired me to look up what mine might be. Best guess has it as the fancy five-petalled flower you see when you search for my last name on wikipedia. Of course, my otherwise soft-spoken uncle vehemently denied any relation between us and the shogunate (it was so out of character that my father suspects a story, but was never able to tease it out of anyone else in the family) so maybe there's some other clan symbol I would be better off using! ;)