Robbie and Bruce Deans,
Sid, Ken and Brian Going,
Robin and Zinzan Brooke.
and I think (but can't be sure) that Tana Umaga Played for NZ against Mike Umaga (who played for Samoa) in the same test.
The Underwoods Rory and Tony (ENG).
Thom Evans and Max Evans (SCOT)
Delon and Stefan Armitage (ENG)
Guy and Andre Boniface FRANCE)
The Camberbero brothers (FRANCE)
The Calder twins James and Finlay (SCOTLAND)
Gavin and Scott Hastings (SCOTLAND)
Scott and Craig Quinnell (WALES)
The Wallace Brothers Richard, David and ? (IRELAND)