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ONEUS Member Ages and Birthdays
South Korea · Official roster: 5 (5 birthdays recorded)
ONEUS members from oldest to youngest: SEOHO (30), LEEDO (29), KEONHEE (28), HWANWOONG (28), XION (26). The oldest is SEOHO, born June 7, 1996; the youngest is XION, born January 10, 2000.
Debut date: Next debut anniversary: January 9
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Exports 5 recorded birthdays on this page, repeating yearly. This file does not update automatically; download and import it again after corrections. Set reminders in your calendar app.
Birthdays of all members
| Birthday | Member | Other spellings |
|---|---|---|
| June 7 | SEOHO 李抒澔서호이서호ソホLee Seo-ho | — |
| July 26 | LEEDO 金建學김건학イドKim Geon-hak | 이도 |
| June 27 | KEONHEE 李建熙건희이건희コンヒLee Keon-hee | — |
| August 26 | HWANWOONG 呂煥雄환웅여환웅ファンウンYeo Hwan-woong | — |
| January 10 | XION 孫東柱시온손동주シオンSon Dong-ju | — |
Roster source: ONEUS JAPAN OFFICIAL SITE ARTISTS (retrieved September 1, 2026)
Age ranking of members (oldest to youngest)
We have full birth dates for 5 of 5 members (members with only a birth month and day are left out, since their age can’t be calculated). Ages update to today’s date.
| Rank | Member | Birthday | Age | Age at debut |
|---|---|---|---|---|
| 1 | SEOHO | June 7, 1996 | 30 | 22 |
| 2 | LEEDO | July 26, 1997 | 29 | 21 |
| 3 | KEONHEE | June 27, 1998 | 28 | 20 |
| 4 | HWANWOONG | August 26, 1998 | 28 | 20 |
| 5 | XION | January 10, 2000 | 26 | 18 |
Ages here are international ages (counted from the date of birth), the system South Korea has also used officially since June 2023, not “Korean age”.
ONEUS Members’ Zodiac Signs
Only members with a known birthday are included. Sign boundaries: zodiac index
This page lists all 5 members on ONEUS’s official roster. 5 of them have their own page on this site (our inclusion rule: someone has held a support event for them, or a verifiable identity or birthday source exists). The rest are marked “roster only” and appear only in this table. Birthdays are listed only when we find a verifiable source; otherwise they’re marked “no verifiable source found.” We never fill gaps with guesses. Spotted an error, or have a verifiable official source? Email service@joelin.cc. (email us a report)
We’ve also logged 1 support cases for the group as a whole (debut anniversary).
Fan Events
Events posted by fans show up here as soon as they’re published. Whether an event is also featured on the home page is a separate pick by Joe and has nothing to do with this list.
Want to hold a support event for ONEUS?
Group support usually centers on debut anniversaries and concerts. Each member’s birthday is in the table above.
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Planning a support project for ONEUS? Sign in with your joelin.cc account to claim it. There’s no approval email to wait for; your details appear below once we’ve checked them. We never collect contact details, only public social links so other fans can find you. Notes that contain contact details are rejected automatically. Names and addresses can’t always be caught automatically; we accept that remaining risk and check by hand before anything is shown.
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FAQ
- What are the birthdays of ONEUS's members?
- ONEUS’s official roster has 5 members. Those with a verifiable birthday on this site: SEOHO June 7, LEEDO July 26, KEONHEE June 27, HWANWOONG August 26, XION January 10. Each birthday’s source is cited on this page and on the person’s own page.
- How many ONEUS members are listed on this site?
- ONEUS: Official roster: 5. Of these, 5 have a verifiable birthday recorded on this site. This page lists all 5 members on ONEUS’s official roster. 5 of them have their own page on this site (our inclusion rule: someone has held a support event for them, or a verifiable identity or birthday source exists). The rest are marked “roster only” and appear only in this table. Birthdays are listed only when we find a verifiable source; otherwise they’re marked “no verifiable source found.” We never fill gaps with guesses. Spotted an error, or have a verifiable official source? Email service@joelin.cc.
- When was ONEUS’s debut?
- ONEUS's debut date is January 9, 2019, so every year on January 9 marks the debut anniversary. In other words, ONEUS’s debut year is 2019. The debut anniversary is one of the most common occasions for group fan support.
- What is the age order of ONEUS's members? Who is the oldest?
- We have birth years for 5 of 5 ONEUS members (members with only a birth month and day can’t be ranked by age). Ordered from oldest to youngest: SEOHO (born June 7, 1996), LEEDO (born July 26, 1997), KEONHEE (born June 27, 1998), HWANWOONG (born August 26, 1998), XION (born January 10, 2000). The oldest is SEOHO, and the youngest is XION.
- What are the zodiac signs of ONEUS’s members?
- Based on their birthdays: Gemini: SEOHO; Cancer: KEONHEE; Leo: LEEDO; Virgo: HWANWOONG; Capricorn: XION. Signs use the month and day only, with the boundary dates explained on our zodiac pages.