Surname อมรสิงห์ (Amarasinghe 
, Amarasingha 
, อมรสิงห์ 
) , all around the world, is a common last name. The surname อมรสิงห์ is habitual in Sri Lanka, where it is a common surname, Maldives, where it is quite a common surname, and Qatar, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Sri Lanka, United Arab Emirates, and Indonesia. Much less frequently, อมรสิงห์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Amarasinghe | Australia, United Arab Emirates, United States, Indonesia, Sri Lanka |
| Amarasingha | Australia, United Arab Emirates, United States, Sri Lanka, Qatar |
| Amornsing, อมรสิงห์ | Thailand |
Amorasingha, Amornsingh, Amtarsingh, and Mrsingh