My middle daughter has the nickname Gomer, her real name is Meredith. While playing a family game she would always be distracted whenever it was her turn. My youngest daughter kept telling her to go mer, it's your turn. Finally it turned into
gomer. That was at least 15 years ago and she has been called Gomer every since. I have to think to call her by her real name in public so as not to embarrass her. The name Gomer does seem to fit her so well.