The Irish Rugby team do not as yet have a nickname
The Ireland National Rugby Union Team.
the Canadian national rugby team is called (nickname I think) Canucks or the Maple Leafs.
The Offcial Name is the Australian National Rugby Union Team, their nickname is the Wallabies.
The Red and Whites
Its simply called The Irish team or Ireland. They do not have a nickname as of yet
The Scotland rugby team has no nickname.
The Welsh national Rugby Union team are The Red Dragons. It's possible to confuse them with the Welsh national Rugby League team who are known as The Dragons.
The nicknames for the French national rugby team are Les bleus, Les tricolores and XV de France.