Family name Sangnoo (Sangnoo 
) , in the world, is a very rare cognomen. The family name Sangnoo is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sangnoo | Thailand |
Sujin, Dawisa, Supaporn, Atthanee, and Napattacha