Sejun
Meaningdepends on the hanja chosen · Korean
Sejun is a Korean boy name whose meaning depends on the characters it's written with. Korean names are usually built from two syllables, each picked for the character it's written with. It sounds crisp and confident, it's easy to spell and quick to call across a playground, and it pairs well with middle names of almost any length.
Did you know?
- Scrabble scoreIf names were allowed in Scrabble, Sejun would score 12 points, thanks largely to the J (worth 8).
- GenerationSejun is having its moment right now. Most Sejuns are still in diapers or at preschool, so picture a Gen Alpha or Gen Beta kid.
- HistorySejun first shows up in US birth records in 2021, the first year at least 5 babies got it. That makes it a fairly new name, younger than many of today's parents.
US births per million boys, 2021–2025
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Popularity: U.S. Social Security Administration (babies with 5+ births per year).
About the name Sejun
Sejun is a boy name of Korean origin. Its two syllables give it an easy rhythm, and the consonant at the end gives it a confident finish. It's a fresh, modern name that only arrived in US birth records in recent decades. It's rarely heard today, so it stands out while still being a real, established name.
Origin:Korean names
More Korean boy names
- Unisex name: Ari · lion
- Boy name: Rami · depends on the hanja chosen
- Unisex name: Sol · sun
- Boy name: Aram · high, exalted
- Boy name: Yuri · farmer
- Unisex name: Sora · sky
- Unisex name: Jin · gold
- Boy name: Sion · depends on the hanja chosen
Questions about the name Sejun
What does the name Sejun mean?
Like most Korean names, Sejun has no single fixed meaning. Each syllable is written with a hanja (Chinese) character, and parents choose the characters, and with them the meaning. The same sound can stand for very different things, so ask a Korean speaker which characters you'd use before you decide.
What is the origin of the name Sejun?
Sejun is Korean in origin. Other Korean names to consider are Ari (“lion”), Rami (“depends on the hanja chosen”), Sol (“sun”) and Aram (“high, exalted”).
Is Sejun a boy or girl name?
Sejun is a boy name.
How popular is the name Sejun?
Sejun is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 2021. It peaked at #10,799 in 2021, so it's a name with history that few kids share today.
What should I know before naming my baby Sejun?
Sejun is a Korean boy name whose meaning depends on the characters it's written with. Korean names are usually built from two syllables, each picked for the character it's written with. It sounds crisp and confident, it's easy to spell and quick to call across a playground, and it pairs well with middle names of almost any length. Say it out loud with your last name and any middle names you're considering, and check the initials it makes.