Family name รัตนแก้วกาญจน์ (รัตนแก้วกาญจน์, Ratanakeawkan, Ratanakaewkan 
) , across the world, is an extremely rare surname. The family name รัตนแก้วกาญจน์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ratanakaewkan | Thailand |