I prefer to wear my own clans tartan, of which I have 6 different options. In addition, I also own a universal tartan kilt. Personally, I would have no problem wearing the tartans of the women who married into my direct line of decent (Young, Wilson, Fraser etc...). But as for the tartans of other clans, I'll let those with blood ties wear them. I have enough options without stepping on someone else's toes.