Cognomen สุทา (Suda 
, Sutha 
, สุทา ) , throughout the world, is a common family name. The cognomen สุทา is characteristic of Qatar, where it is quite a common surname, Malta, and Lesotho, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in India, Indonesia, and the United States. Likewise, สุทา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Suda | Thailand, Poland, United States, India, Indonesia |
| Sutha | Thailand, United States, India, Indonesia, Sri Lanka |
| สุทา | Thailand |