In all the world, ถนอมรัตน์ (ถนอมรัตน์ 
, Thanomrat , Tanomrat 
) is a rare dominantly female, but infrequently male given name. The given name ถนอมรัตน์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare largely girly, but uncommonly boy's name. Also, ถนอมรัตน์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Thanormrat, Thanomrat, ถนอมรัตน์ | Thailand |
| Tanomrat | Thailand, United States |