1. English: Ginn is an English surname derived from the Old English personal name Ginna, meaning "gap" or "opening." It could have been used to describe someone who lived near or worked at a gap or opening in a fence or wall, or possibly a person with a distinctive gap in their teeth.
2. Irish: Ginn is also found as an Anglicized form of the Irish surname Ó Geinn, which means "descendant of Geinn." Geinn is a personal name that may be derived from the Old Irish word "gein," meaning "birth" or "progeny."
3. Cornish: In Cornwall, England, Ginn is believed to have originated as a nickname for someone with a fair or reddish complexion. It is derived from the Cornish word "gin," which means "fair" or "white."
4. Jewish: Ginn is occasionally found among Ashkenazi Jewish families. It is believed to be a variant spelling of the Hebrew name Ginat, which is derived from the word "gan," meaning "garden" or "paradise."
The distribution of the Ginn surname suggests that it is primarily of English and Irish origin, with some instances of Cornish and Jewish ancestry. However, without detailed genealogical research, it can be challenging to pinpoint the exact origins and history of a particular Ginn family.