Had 3 over the years of the many dogs in my life. Two were Pits, one named Ginger since she was the color of a roan horse with white markings, the second pit was one named Betty-----only because I got her when she was over a year old and was already named that. The third dog was my wife's cocker spaniel she had when I met her and his name was Cole, after Nat King Cole-----why, I don't know.
Before I name the pet I watch them. Whatever they do I observe and use that to name them. Actually I did the same with my kids also. Anyway after a bit of observation I decided to name the dog "Eat and shit" and I gave him to my son who is named "Eat and shit" also.