Fuck 'em. You have a great name and should be proud of it. You're right, they're just trying to be dicks, and you shouldn't let it get to you. Kids are cruel, well, actually, people are cruel, they're just slightly less obvious when they're adults. Ignore them and smile. They're trying to get rise out of you. If they only get a pleasant smile then they'll eventually stop because you aren't giving them what they want. The extreme opposite route is to put your fist through the face of the next person who does it and make it abundantly clear why you did it. Those are pretty much your two extremes, and you'll probably find something that in between that works for you.