Willy Tonga and Esi Tonga at Parramatta in the NRL.

Sam & Joel.

The Johns brothers at Newcastle Knights in the NRL.

Nathan and Ian Hindmarsh at Parramatta in the NRL.

Brett and Josh Morris (twins) have played together for Australia.

The Walters brothers twins, Kevin and Kieran, for Brisbane.

I am not sure if non-twin brothers Kevin Walters (Brisbane) and Steve Walters (Canberra) ever played together for Queensland or Australia.

Ken and Dick Thornett for Parramatta in the NSWRL.

Greg "Brandy" Alexander (now with Fox Sports TV) and Ben Alexander (who died in a car accident) played together at Penrith under abrasive coach Phil Gould.

I presume none of you bothered to read the post seeing as 4 of the 6 mentioned in it have been mentioned again lol

Darren Smith (St Helens) and Jason Smith (Hull FC) played together at Canterbury Bankstown 1990-94.

Ashton and Tariq Sims at the Cowboys

Isaak and Leeson Ah Mau played a game or two together with the Cowboys too from memory

Mark and Matt Geyer played together for a short while with the Western Reds(I think)

Anthony Minichiello plays for the Sydney Roosters and brother Mark played one game for them, I think while Anthony was playing

Kevin and Wes Naiqama might have played together. I have a feeling they have but uncertain again

Lopini and Mickey Paea have definitely played together at the Roosters

Frank and Tony Puletua have possibly played together with Penrith.

Stewart brothers at Manly are an obvious if they haven't been mentioned

David and Anthony Gibbons at Leeds (depressingly).

Mark & Martin Gleeson at Warrington

IIRC Bradford Northern used to have the Thompson twins. Although there was only one of them.

Or summat.

briscoe brothers at hull fc, although they havn't played together in a SL match, only warm up games