In the USA, Taffy is used consistently as a name for girls only, appearing in the SSA stats from 1947 to 1996. American usage comes from a comic strip "Terry and the pirates" featuring a female character named Taffy.See also: http://www.nancy.cc/2020/08/05/baby-name-taffy/
See also: http://www.nancy.cc/2020/08/05/baby-name-taffy/