Lots of people name them, I don't because a lot of them end up in the stew pot. Generally, the rooster is called Mr Chicken if he's called anything and the hens are "the girls". With my very first birds which were straight run barred rocks I only ended up with 2 and it was Mr and Mrs Chicken. When I had guineas, the white one was called Killer, because he was the only one in the shipping box that arrived alive. He was a funny guy.