If we are going to have a blog about the history of Merthyr Tydfil, it is perhaps natural to start with how Merthyr Tydfil got its name.
The story starts with the legendary 5th Century king Brychan Brycheiniog. Brychan was allegedly the son of the Irish king Anlach, son of Coronac, and of Marchell ferch Dewdrig heiress of the Welsh kingdom of Garthmadrun, which the couple later inherited. Upon his father’s death, Brychan returned to Garthmadrun and changed its name to Brycheiniog. Brychan had four wives and several concubines and was said to have had 24 sons and 25 daughters. Tydfil was his 23rd daughter by his fourth wife. Most of Brychan’s children were well educated, girls and boys, at a school in Gwenddwr on the Wye and went on to live deeply religious lives.
Tydfil decided to make her home in the Taff Valley, sparsely populated by Celt farmers. She established an early Celtic monastic community, leading a small band of men and women. She built an enclosure around a small wattle and daub church, and she became known for her compassion and healing skills as she nursed both sick humans and animal.
In approximately 480AD, the aged Brychan decided to visit his children one last time. He took with him his son Rhun Dremrudd, his grandson Nefydd and his son along with several servants. They visited his third daughter, Tanglwstl, at her religious community at Hafod Tanglwstl, what is now known as the village of Aberfan, south of Merthyr Tydfil. Brychan wanted to stay with his daughters a little longer, so he sent most of his warriors and Nefydd on ahead, along the homeward journey. The king went on to Tydfil’s home while Rhun and Nefydd’s son were still at Hafod Tanglwstl.
At the time, Wales was experiencing raids from Scottish Picts who had settled in Radnorshire, and it was during Brychan’s journey from Hafod Tanglwstl that one of these raids occurred. Rhun was attacked by a raiding party, a mile from Hafod Tanglwstl and he died defending a bridge over the river at what is now the village of Troedyrhiw. With the bridge undefended, the marauding Picts were free to attack the King’s party. One group destroyed Hafod Tanglwstl, whilst the other attacked Brychan’s party which had reached Tydfil’s community. The party were all murdered, but whilst most ran away or fought, Tydfil knelt and prayed, but she too was cut down.
Tydfil was buried within the church she founded, and a Celtic cross was put up in a clearing near the Taff to mark the place where ‘Martyr’ Tydfil was slain and which became a site of pilgrimage. In the 13th century the cross and wattle and daub church were replaced by a stone church dedicated to Saint Tydfil the Martyr. This was in turn replaced in 1807, and rebuilt again in 1894.
