There is good reason why ONE Championship is known for its world-class and exciting MMA, Muay Thai, kickboxing, and submission grappling matches that take place every week.
The promotion boasts hundreds of superstars who showcase their talents in blockbuster events around the world, attracting millions of fans.
There are, however, some athletes whose family members also compete in ONE. Sibling pairs such as Rene and Robin Catalan, Edward and Eric Kelly, Gianni and Keanu Subba have all competed in the promotion.
Let’s have a look at some of the sibling pairs who are currently dominating ONE Championship.
Christian Lee And Adrian Lee
Arguably, the greatest martial arts family in the world, the Lee family has produced one champion after another.
Currently, ONE Lightweight and Welterweight MMA World Champion Christian Lee is ruling over two stacked divisions. He is a four-time ONE Lightweight MMA World Champion, ONE Welterweight MMA World Champion, and ONE Lightweight MMA World Grand Prix Champion.
Out of his 17 victories under the ONE banner, 16 have come by finish — showcasing his extraordinary finishing ability.
Now, his younger brother, Adrian Lee, is following the same path. The 19-year-old has won all three of his fights by submission and is expected to return to action soon.
Kade Ruotolo And Tye Ruotolo
The story of Brazilian Jiu-Jitsu and submission grappling would be incomplete without mentioning the Ruotolo brothers. The twin sensations made their ONE debut in 2022 after achieving success at every level.
Since then, Kade has become ONE Lightweight Submission Grappling World Champion and Tye has claimed the ONE Welterweight Submission Grappling World Title.
Both are undefeated so far in their ONE careers. Interestingly, Kade transitioned to MMA, scoring three straight wins. Now, Tye could make his debut later this year.
Jonathan Haggerty And Freddie Haggerty
The reigning ONE Bantamweight Kickboxing World Champion Jonathan Haggerty is the most renowned face of the U.K. Muay Thai scene. The 28-year-old previously held ONE Flyweight and Bantamweight Muay Thai World Championships.
Now, his younger brother is walking in his accomplished brother’s footsteps. Freddie Haggerty has shown tremendous potential by winning three fights by highlight-reel KOs. He, however, suffered a loss in a tightly contested fight in his last bout.
Johan Estupinan And Jordan Estupinan
The double trouble of Estupinans. In 2024, Johan Estupinan became the first-ever Colombian striker to fight in ONE Championship. His ruthless yet entertaining style quickly made him an instant fan favourite.
“Panda Kick” remains undefeated in his five fights and has all the makings of a future World Champion. His twin Jordan Estupinan made his ONE debut in 2025, and since then, he has secured two victories to his name.
SHARE
