I'd go with the Celtic knot too but mine would have an owl alongside. The owl's always been my symbol for too many reasons for seconds worth of computer time now. I've also always been drawn (no pun intended for once) to many of the Celtic patterns and imageries anyway but the knot of friendship was given to me by a special child I'd supported through schooling for years and that's the one I wear now all the time instead of an owl. Sentimental swine huh ?