Across the world, วัยโรจน์ (วัยโรจน์ 
) is a very rare male first name. The first name วัยโรจน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare boy's name. Very seldom, วัยโรจน์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| วัยโรจน์ | Thailand |
| วัยโรจน์ พิพิธภักดี Thai politician, TH (b. 1941) |
|
หัดขะเจ, ฉัตรขจรทรัพย์, and พิพิธภักดี