Saint Tydecho

[5][6] Tydecho lived with his sister Tegfedd in the Mawddwy area and was the founder of churches at Llanymawddwy, Mallwyd, Garthbeibio and Cemmaes.

Tydecho, who slept on rocks, wore a hair shirt and engaged in agriculture, used oxen to plough his fields.

A visit to Tydecho's land the next day found him using a pair of wild stags to plough with a grey wolf pulling the harrow behind them.

[5][9] Another legend says that a milkmaid working for Tydecho slipped when crossing the river and her pail of milk spilled into the water.

Tydecho's response to the accident was to turn the river from its source to the village of Llanymawddwy into a stream of milk; he called this section Llaethnant.