Cognomen สุขใจ (Sukhchain 
, สุขใจ 
, Sukjai 
) , all over the world, is quite a common surname. The cognomen สุขใจ is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname, Singapore, where it is a rare surname, and Myanmar. Not in comparison with a country's population, it is commonest in Thailand, India, and Myanmar. Also, สุขใจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sukhchain | Malaysia, Oman, United States, India, United Arab Emirates |
| สุขใจ | Thailand |
| Sukjai | Thailand, Malaysia, United States, Myanmar, India |
| Sookjai | Philippines, Thailand, United States |
Amsudjai, Marsukjai, Pasookjai, Pusomjai, Sanerjai, Sanitjai, Sanukchai, Shudjai, Sokhua, Sokjai, Soojai, Sookchaoy, Sookchaui, Sookcheay, Sookchoay, Sookhai, Sooklhay, Soosjai, Sotjai, Soukchai, Soukchay, Sruamchai, Sucsai, Sujaija, Sujaikam, Sujaikum, Sujaiya, Sukarbjai, Sukchaheong, Sukchai, Sukchaidi, Sukchaiy, Sukchaui, Sukchroey, Sukchuaw, Sukeechit, Sukheiad, Sukhjai, Sukjadit, Sukjaii, Sukjay, Sukjubjai, Sukkahruak, Sukkhai, Sukkhaiw, Sukkhojai, Sukkhuat, Sukkrajai, Sukojai, Suksajai, Sumjai, Susaijai, Suujai, and Swngjai