Cognomen Gadwa (Gadwa 
) , around the world, is a rare surname. The family name Gadwa is characteristic of Iceland, where it is quite a rare surname, Canada, where it is a rare surname, and New Zealand. Measured by absolute frequency, it is the most numerous in the United States, Canada, and India. Very seldom, Gadwa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gadwa | Canada, Iceland, New Zealand, United States, India |