Nope, I've never had one. Once in a while, my older sister would call me
Jan, but she was the only one who ever did and it was only once in a while. Nobody else has ever shortened it, ever. I never kicked up a fuss about it, but I definitely would not want to be generally called
Jan.
Once I was waited on by a waitress whose name tag said "
Jan" and somehow it came up and she told me that her full name was
Janice but she always went by
Jan. She's the only other
Janice I've ever run into who went by that.
B.'s real name is
Kenneth and he knows so many people, whom I've met, who go by a nickname that is totally unrelated to the name that is on their birth certificates. Once I said to him, "
Janice is what's on my birth certificate and
Janice is what I'm called. Isn't that crazy?"