Oh man, you should design your own sigil after an animal you like. That way when people ask you "why is there a bear* on your bracer?" you can reply, as sternly as possible:
That is the mark of House Harkonen.** It is a symbol of my pride. You would do well to remember it, along with my house's words 'down with pants, up with skirts'. Good day"
*I don't know what animals you like
**I also don't know your last name.