Cognomen 瑜剑 (瑜剑 
) , all over the world, is a very rare last name. The family name 瑜剑 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 瑜剑 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 瑜剑 | China |