Throughout the world, Joonsoo (Joonsoo 
) is a rare masculine first name. The first name Joonsoo is habitual in Eastern Asia, particularly South Korea, where it is quite a rare boy's name. Much less frequently, Joonsoo is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Joonsoo | South Korea, Estonia, Cambodia, United States, Canada |
| joonsoo jeong researcher |
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| joonsoo kim researcher |
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| joonsoo kang researcher |
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| joonsoo choi Ph.D. New York University 1995 |
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| joonsoo kim figure skater |
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