Family name ซัด (Swash 
, ซัด 
) , in the world, is a rare cognomen. The family name ซัด is habitual in the United Kingdom, where it is a rare surname, Belgium, where it is a very rare surname, and Australia. Not in comparison with a country's population, it is the most numerous in the United Kingdom, Australia, and India. Also, ซัด is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Swash | Canada, United Kingdom, Democratic Republic of the Congo, India, Australia |
| ซัด | Thailand |