Ireland has many rugby teams. However, what you are probably referring to is why there is not a Republic of Ireland and a Northern Ireland team. The reason is that, like many sports in Ireland, rugby is played on an all-Ireland basis and there one organisation that looks after it, the Irish Rugby Football Union, and so there is one international team.
Gghj
Ireland's National rugby squad doesn't have a nickname
Brian O'Driscoll
Declan Kidney.
brian o'driscoll ronnon o'gara
It's Brian O'Driscoll
Brian O'Driscoll.
Munster rugby who won 2 Heineken cups beating off Toulouse and Biarritz .
England, Wales, Scotland and Ireland.
The Ulster rugby team were runners up in the Heineken Cup league in 2011-12. In 2012 itself they won an amazing 13 games in a row which is the longest unbroken run of wins in their history.
Keith Wood