Family name รัตนสัค (รัตนสัค 
) , in the entire world, is a very rare surname. The surname รัตนสัค is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| รัตนสัค | Thailand |
| สมศาสตร์ รัตนสัค Thai politician (1931-2011), TH (b. 1931) |
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