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Family name Gammage (Gammage
) , globally, is quite a rare last name. The cognomen Gammage is habitual in the United Kingdom, where it is a rare surname, Australia, and the United States. Measured by absolute frequency, the name is most common in the United States, the United Kingdom, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Gammage | Canada, Australia, United States, United Kingdom, South Africa |