Surname ทองคำขาว (ทองคำขาว, Lartongkham 
, Thittongkham ) , throughout the world, is a very rare last name. The cognomen ทองคำขาว is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thotongkam, Lartongkham, Thittongkham | Thailand |
Thongcumkhaw, Thongkamkaow, Thongkamkhao, Thongkamkhow, Thongkhamkhao, Thongkhamkhaw, Thothongkam, Thothongkham, Tongkamkhao, and Tongkamkhaw