Siwoo
Meaningdepends on the hanja chosen · Korean
- US rank
- #9,714
- Syllables
- 2
- Peak
- #9,714 in 2025
7 babies were named Siwoo in the US in 2025.
Save adds it to your list. Vote moves it up the top voted names.
US births per million boys, 2008–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Siwoo you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 243,902 baby boys born in the US in 2025 was named Siwoo, 7 babies in all. In a typical school of 500 kids, your Siwoo would very likely be the only one.
- HistorySiwoo first shows up in US birth records in 2008, the first year at least 5 babies got it. That makes it a fairly new name, younger than many of today's parents.
- Best yearSiwoo is at its all-time high right now: #9,714 in 2025.
- New on the sceneSiwoo wasn't given to enough babies to be counted in 2000. It only took off after 2008.
- OriginSiwoo is the #4 most popular Korean boy name in the US. That's out of 27 Korean boy and unisex names in our list.
About the name Siwoo
Siwoo is a boy name of Korean origin meaning “depends on the hanja chosen”. It has 5 letters and 2 syllables, starting with S and ending in “-woo”. US birth records list Siwoo for boys from 2008 to 2025, in 5 of those 18 years. Its best year was 2025, when it ranked #9,714 among boy names. In 2025 it ranked #9,714, with 7 babies.
Origin:Korean names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 2000s | 1.3 | 800,000 boys |
| 2010s | 0.3 | 3,225,806 boys |
| 2020s | 1.6 | 606,061 boys |
More Korean boy names
- Unisex name: Jin · gold
- Boy name: Joon · often talented
- Boy name: Junho · depends on the hanja chosen
- Boy name: Jiho · depends on the hanja chosen
- Unisex name: Jimin · depends on the hanja chosen
- Boy name: Hajun · depends on the hanja chosen
- Unisex name: Haneul · sky, heaven
- Unisex name: Hyun · often wise, virtuous
Questions about the name Siwoo
What does the name Siwoo mean?
Siwoo means “depends on the hanja chosen” in Korean.
What is the origin of the name Siwoo?
Siwoo has Korean roots in our records. Other Korean names include Jin, Joon, Junho.
Is Siwoo a boy or girl name?
Siwoo is a boy name.
How popular is the name Siwoo?
Siwoo ranked #9,714 for US boys in 2025, given to 7 babies. Its best year was 2025 (#9,714).