Like I said, I have seen hundreds of pics of people with Crest or clan badge tattoos. I have yet to hear of any of them being sued or even of anyone raising a stink. Do what you like, mate, I for one think it would be a great tattoo.

It's not like you are trying to pass yourself off as a clan chief or anything, you are looking to get a permanant salute to your family (immediate and family name).