Family name รัตนาธิวัฒ (รัตนาธิวัฒ 
) , throughout the world, is an extremely rare cognomen. The last name รัตนาธิวัฒ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| รัตนาธิวัฒ | Thailand |