If you want something on your calf and you ar eitching for ink, check out the Father knot which would look great with your son's name around the top and on your calf http://www.luckyfishart.com/fatherknot.html

some other alternatives:
Family circle http://www.luckyfishart.com/familycircle.html
Celtic Inheritance http://www.luckyfishart.com/cein.html
manhood knot http://www.luckyfishart.com/manhoodknot.html

Pat Fish has some awesome designs. I hope to use one of her designs one of these days.