Last name วิโรจน์ยืนยง (วิโรจน์ยืนยง 
) , in the entire world, is a very rare cognomen. The cognomen วิโรจน์ยืนยง is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| วิโรจน์ยืนยง | Thailand |