Worldwide, Youngsu (Youngsu 
) is a rare principally feminine, but very seldom masculine first name. The forename Youngsu is habitual in Eastern Asia, particularly South Korea, where it is a rare girly name, and China, where it is an extremely rare boy's name. Much less frequently, Youngsu is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Youngsu | Myanmar, Thailand, United States, South Korea, China |
| youngsu jung researcher ORCID ID = 0000-0001-8173-736X |
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| youngsu kim Ph.D. Purdue University 2014 |
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| youngsu c kwon researcher |
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| youngsu cha researcher |
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| youngsu cha Ph.D. New York University 2015 |
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| youngsu chae Ph.D. Georgia Institute of Technology 2002 |
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| youngsu oh researcher (ORCID 0000-0002-6066-3151) |
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