Clarence ‘Frogman’ Henry

Clarence is a masculine given name. It was adopted as a first name from the Duke of Clarence, a title given to sons or younger brothers of English and British monarchs, which in turn derives from the estate name Honour of Clare. Its popularity as a first name increased in the second half of the 19th century in tribute to Prince Albert Victor, Duke of Clarence and Avondale, eldest son of Edward VII.

Biography summary from English Wikipedia, photograph via Wikimedia Commons.