All over the world, Youngjai (Youngjai 
) is a rare boy's forename. The given name Youngjai is characteristic of Eastern Asia, particularly South Korea, where it is a rare boy's name. Much less frequently, Youngjai is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Youngjai | South Korea, Thailand, United States |
| youngjai kiem Ph.D. Princeton University 1995 (b. 1969) |
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| youngjai you researcher |
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