Gan may also be an Irish surname, originating from Mag Gana.
[1] The Ashkenazi Jewish surnames Gan (גן) and Gang are short for Gangolf, which itself originated by metathesis from the German masculine given name Wolfgang.
Gan is further the origin of the patronymic surnames Ganer, Ganel, and Ganet.
In 1881 there had been 40 people in Great Britain with the surname Gan, primarily at Durham, Northumberland, Lancashire, Argyll, and London.
[1] The 2010 United States Census found 2,891 people with the surname Gan, making it the 11,003rd-most-common name in the country.