ONEUS
韓國 Official roster: 5（5 birthdays recorded）
Debut date: Next debut anniversary: January 9
member Birthdays
| Birthday | member | Other spellings |
|---|---|---|
| June 7 | SEOHO （이서호） | Lee Seo-ho, SEOHO, ソホ |
| July 26 | LEEDO （김건학） | Kim Geon-hak, LEEDO, イド |
| June 27 | KEONHEE （이건희） | KEONHEE, Lee Keon-hee, コンヒ |
| August 26 | HWANWOONG （여환웅） | HWANWOONG, Yeo Hwan-woong, ファンウン |
| January 10 | XION （손동주） | Son Dong-ju, XION, シオン |
Roster source: ONEUS JAPAN OFFICIAL SITE ARTISTS (obtained 2026-09-01)
member Age Ranking
This site has birth-year data for 5 out of 5 member (member with only month/day and no birth year are excluded, as age cannot be calculated). Oldest: SEOHO (30 (in 2026; 29 before June 7)); youngest: XION (26 (in 2026; 25 before January 10)).
| Rank | member | Birthday | Age |
|---|---|---|---|
| 1 | SEOHO | June 7, 1996 | 30 (in 2026; 29 before June 7) |
| 2 | LEEDO | July 26, 1997 | 29 (in 2026; 28 before July 26) |
| 3 | KEONHEE | June 27, 1998 | 28 (in 2026; 27 before June 27) |
| 4 | HWANWOONG | August 26, 1998 | 28 (in 2026; 27 before August 26) |
| 5 | XION | January 10, 2000 | 26 (in 2026; 25 before January 10) |
This page lists all 5 member per ONEUS's official roster; 5 of them have an individual page on this site (our inclusion criterion is "has anyone held a support event for them, or is there a verifiable identity/birthday source"). The rest are marked "roster-only entry" — listed in this table only, with no individual page. Birthdays are listed only when a verifiable source is found; otherwise marked "no verifiable source obtained," never filled in by guesswork. Found an error, or have a verifiable official source? Please email service@joelin.cc. (open a report email)
This site also records 1 support cases held for the group as a whole (出道週年紀念).
Want to hold a support event for ONEUS?
Group support is commonly held around debut anniversaries and concerts, with member birthdays each following the dates in the table above.
How & where to hold a photo booth event → Custom photo booth frame / full-booth booking →
FAQ
- What are the birthdays of ONEUS's member?
- ONEUS's official roster has 5 member in total; the ones with a verifiable birthday on this site are:SEOHO June 7, LEEDO July 26, KEONHEE June 27, HWANWOONG August 26, XION January 10. Every birthday's source is cited both on this page and on the individual's own page.
- How many member of ONEUS are on this site?
- ONEUS has Official roster: 5, of whom 5 have a verifiable birthday recorded on this site. This page lists all 5 member per ONEUS's official roster; 5 of them have an individual page on this site (our inclusion criterion is "has anyone held a support event for them, or is there a verifiable identity/birthday source"). The rest are marked "roster-only entry" — listed in this table only, with no individual page. Birthdays are listed only when a verifiable source is found; otherwise marked "no verifiable source obtained," never filled in by guesswork. Found an error, or have a verifiable official source? Please email service@joelin.cc.
- When did ONEUS debut?
- ONEUS's debut date is January 9, 2019, so every year on January 9 marks the debut anniversary. In other words, ONEUS debut in 2019. The debut anniversary is one of the most common occasions for group fan support.
- What is the age order of ONEUS's member? Who is the oldest?
- Among ONEUS's member, this site has birth-year data for 5 out of 5(member with only month/day and no birth year cannot have an age calculated, and are excluded from the ranking.) Ordered from oldest to youngest: SEOHO（30 (in 2026; 29 before June 7)）, LEEDO（29 (in 2026; 28 before July 26)）, KEONHEE（28 (in 2026; 27 before June 27)）, HWANWOONG（28 (in 2026; 27 before August 26)）, XION（26 (in 2026; 25 before January 10)）. The oldest is SEOHO, and the youngest is XION.
View this page in Chinese → Back to group index Birthday calendar