Last name ถนอมจิตร์ (Thanomchit 
, Thanomjit 
, ถนอมจิตร์ ) , in the world, is quite a rare surname. The family name ถนอมจิตร์ is characteristic of South-eastern Asia, particularly Laos, where it is quite a rare surname, and Thailand. Likewise, ถนอมจิตร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thanomchit | Canada, Thailand, France, Laos, United States |
| Thanomjit | Norway, Thailand, United States, United Kingdom |
| ถนอมจิตร์ | Thailand |