Assuming you mean the WRU and not the country then it was the selection of the first official Welsh team by the remarkable Richard Mullock to face England at Mr Richardson's Field, Blackheath on 19th February 1881, that hastened the formation of what we now know as the Welsh Rugby Union.
The WRU have been the head administrators of Wales's national sport since 1881. A group of 11 clubs - Swansea, Lampeter, Llandeilo, Cardiff, Newport, Llanelli, Merthyr Tydfil, Llandovery, Brecon, Pontypool and Bangor - came together at the Castle Hotel, Neath on 12th March 1881, to form the Welsh Rugby Football Union. It was a meeting that took place on the same day that Cardiff beat Llanelli in the fourth South Wales Challenge Cup Final in Neath.
Cyril Chambers, of Swansea Football Club, was elected the first President of the WRFU and Richard Mullock, of Newport, became the first Honorary Secretary and Treasurer. It had been Mullock who had selected the Welsh team to play in that first, fateful international at Blackheath against an England side that had being playing internationally for a full decade and that had lost only twice in their 17 Tests to that time.
Jimmy Wales is famous because he founded Wikipedia.
The South Wales Evening Post was founded in 1893 with the name South Wales Daily Post. Its name changed in 1932 from the South Wales Daily Post to its current name.
Jimmy Wales and Larry Sanger founded Wikipedia.
Jimmy Wales founded Wikipedia.
Wikipedia is a project by Wikimedia Foundation and founded by Jimmy Wales and Larry Sanger.
abergavenny bowls club first bowls club to be founded in wales in 1860
Julian Hodge Bank is and independent bank that was founded in 1987, in Cardiff, Wales. Julian Hodge is still the only bank with it's headquarters in Wales.
1941 by Kurt Hahn; In Aberdovey, Wales
Wikipedia was founded by Jimmy Wales and Larry Sanger in January 2001.
CAFOD, also known as the Catholic Agency For Overseas Development, was founded in 1962 by the Catholic Church in England and Wales.
Wikipedia
Wikipedia was founded by both Jimmy Wales and Larry Sanger .