My trusty name dictionary says
Cheryl is a "development" of
Cherry, influenced by
Beryl which was popular in the 1920s (when
Cheryl was first used). It was originally pronounced with a hard Ch, but then French
Cherie and its phonetic form
Sherry became popular (30s or so).. and by the 40s
Sheryl appeared -- maybe because some bearers of
Cheryl said it with a Sh.
So
Cheryl's sort of an English-language combo of
Cherry,
Beryl, and French
Cherie / English
Sherry.
My dictionary author usually notes famous bearers in his entries, but none are mentioned for
Cheryl.
- chazda