United Rugby Championship

==Celtic League==
===2001–2006===
The Celtic League was founded in 2001, featuring rugby union clubs from Scotland, Wales and Southern and Northern Ireland.
==Magners League==
===2006–2011===
Magners became title sponsors of the Celtic League in 2006. In 2010-11, Italian teams joined for the first time.
==RaboDirect Pro12==
===2011–2014===
In 2011, it was announced that Rabobank had bought the sponsorship, using their RaboDirect brand as a title sponsor. The Pro12 name represented the number of teams in the league.
==Guinness Pro12==
===2014–2017===
Guinness became the new sponsors of the Pro12 on 10 July 2014.
* Pro12: Guinness named as league's new sponsor - BBC Sport, July 10, 2014
==Guinness Pro14==
===2017–2021===
The 2017 addition of two South African teams (Cheetahs and Southern Kings) brought the club count up to 14, and the competition was renamed accordingly.
==United Rugby Championship==
===2021–present===
==External links==
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Category:Rugby union
Category:Sports competitions in the United Kingdom
Category:Sports competitions in Italy
Category:Sports competitions in South Africa
Category:Rugby union competitions in South Africa
Category:Rugby union competitions in the United Kingdom
Category:Sports competitions in Ireland