- Kristian Keinhorst, Markus Keinhorst, Nick Keinhorst, James Keinhorst
- Czech Republic (Prague)
The most siblings to play in a rugby league international is four and was achieved by Kristian Keinhorst, Markus Keinhorst, Nick Keinhorst and James Keinhorst (all Germany) who represented Germany against the Czech Republic in the European Rugby League Shield Competition, in Prague, Czech Republic, on 4 August 2007. Markus, Kristian and Nick started the game and played the full 80 minutes while James came on as a substitue in the early stages of the second half. Germany won the match 44-22 with the brothers scoring 24 points between them. The match was part of the Euro Shield sanctioned by the RLEF (Rugby League European Federation).