Family name เที่ยงเพชร (เที่ยงเพชร, Noonphet 
) , all around the world, is a very rare cognomen. The surname เที่ยงเพชร is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Noonphet | Thailand |