Wow, thats actually quite freaky. I never watched full house so I didn't know this, but I have a 5 yr old, Alexander and am having twins in the new year, a boy and a girl, and we're thinking of naming the boy Nicholas. Weird.Oh and Jayden and Hayden is just awful.
Alex and Nick seem to be quite common for brothers. Besides Full House there's also McLeod's Daughters and I've seen it in a couple of books as well as in real life.