Last name สมนันท์ (Samnan 
, Somnan 
, สมนันท์ ) , around the world, is a rare cognomen. The surname สมนันท์ is characteristic of Thailand, where it is a rare surname, Saudi Arabia, where it is a very rare surname, and Bangladesh. Also, สมนันท์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Samnan | Saudi Arabia, Morocco, India, Pakistan, Bangladesh |
| Somnan | India, United States, Thailand |
| สมนันท์ | Thailand |