Last name เลิศวัฒนชัย (เลิศวัฒนชัย 
, Lerkwattanachai , Leartwattanachai ) , in the entire world, is a very rare surname. The cognomen เลิศวัฒนชัย is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Leartwattanachai, Lerkwattanachai, Lertvatanachai, เลิศวัฒนชัย | Thailand |