Surname Garthwright (Garthwright 
) , across the world, is an extremely rare cognomen. The last name Garthwright is habitual in the United Kingdom, where it is an extremely rare surname, Canada, and the United States. Very seldom, Garthwright is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Garthwright | United Kingdom, South Africa, Canada, United States |