Welsh-born cousins Carwyn and Kepu Tuipulotu are set to play their first professional game against each other on Friday night. Carwyn has been named to start at No.8 for French side Pau in their European Challenge Cup Round of 16 match against Bath, while Kepu is included on the Gallagher Premiership side's bench as their replacement hooker and will likely come on in the second half to share the field with his cousin. They are part of a famous rugby family, with Taulupe Faletau and England stars Billy and Mako Vunipola among their cousins. Carwyn's father Kati is a former Tongan international who played for Ebbw Vale, Dunvant and Neath, while Kepu's father Sione played for the Dragons and his sister Sisilia is a key player for Wales Women. However, there is set to be no love lost between the cousins, with Carwyn admitting before the match that Kepu had promised to "try to steamroll" him when he gets onto the field. The older of the two cousins, 23-year-old Carwyn made the move to France in February after a muted few years at the Scarlets and a short loan spell with Saracens. A powerful ball-carrier, he has made a big impact in his first few weeks with his new side, who sit in ninth in the Top 14 table, and is eager to impress in the shadow of the Pyrenees as he targets a Wales place. "It was frustrating at the Scarlets because I felt I was gaining momentum last season, but then I was finding it hard to get into the starting line-up this season because of the quality of their back row,” he said following his move. “It’s a time of change in Welsh rugby and I want to be a part of that. This chance has suddenly come along for me to make an impact and I’m determined to take it. Playing in France, with and against so many good players, can only help me improve and hopefully catch people’s eye.” While his cousin is still chasing his dream of representing Wales on the international stage, however, Kepu made the controversial decision to swap the country of his birth for the Red Rose of England. The 19-year-old took a scholarship at the prestigious Harrow School in London which meant he represented England at age grade level. The teenager is also eligible to play for Tonga through his father, making the choice over his international allegiance potentially difficult, but he believes the English pathway is the right one for him. “My family live in Wales," he explained. But with my schooling in England and anything I have done in age-grade rugby, it eased making a decision a little bit. “I just want to be the best I can at the highest level and I just thought England was the right pathway. Going through the England pathway, I can develop my game to a whole other level and can also gain experiences from the older lads that I wouldn’t necessarily get in other places. “My decision to play for England is based on how can I become the best I can in an environment that is world-class and also pushing for my success, so I thought England was the correct pathway for me.” Tonight's clash of the cousins will kick off at 8pm in the Estadio du Hameau in Pau, with the winner set to face either Montpellier or Gloucester in the quarter-final.