No urban myth, I worked for a dentist in high school. Two of his patients were twins, oranjello and lemonjello. Cute little identical boys. Lots of fun.
There is a white family quite well educated who named their son Braxton Hicks! I dunno--maybe she was in labor a little too long.
"Braxton Hicks" - My youngest grandson, 10 weeks old is Braxton. Daughter thought it had a "sound" to it.
Urban and internet legends have to start somewhere. I suspect we would find quite a few of them are true if we could trace them all back to their beginnings.