Two chaps used to work for me, one called Richard Head, were his parents mad??the other Ian Hunt, affectionately called Issaac by all and sundry. Both are still in the city making fortunes!!
My brother just reminded me about my mother who had a West Indian pupil in her class called Dick Everard (in time honoured style the attendance register was read out Surname first).
She metioned the name to his mother and asked her why she hadn't registered him for school as Richard. It turned out he was christened Dick.