Saint Tegai is the patron saint and founder of Llandygai in the Welsh

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 county of Gwynedd

Gwynedd

Gwynedd is a county in north-west Wales, named after the old Kingdom of Gwynedd. Although the second biggest in terms of geographical area, it is also one of the most sparsely populated...

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According to Enwogion Cymru, Tegai was a saint who lived in the early part of the sixth century He was one of the sons of Ithel Hael

Ithel Hael

Ithel Hael or Ithel Hael o Lydaw was a prince of Armorica who lived in the early part of the sixth century. He was the father of Baglan, Flewyn, Gredifael, Tanwg, Twrog, Tegai, Trillo, Tecwyn and Llechid, saints who accompanied Cadvan to Britain....

, and with his brother Tecwyn

Saint Tecwyn

Saint Tecwyn is the patron saint and founder of Llandecwyn in the Welsh county of Gwynedd.According to Enwogion Cymru, he was the son of Ithel Hael, and came to Britain with Saint Cadfan, in the time of Vortigern "who procured wise men and divines from Gaul, now called France, to renovate...

 accompanied Saint Cadfan

Saint Cadfan

Saint Cadfan, ; , Abbot of Tywyn and Bardsey was a Breton Saint who lived in 6th century Wales. A Breton nobleman, he was the son of Eneas Ledewig , and Gwen Teirbron, a daughter of Budic II, a King of Brittany.- Associations & Legacy :...

 from Brittany

Brittany

Brittany is a cultural and administrative region in the north-west of France. Previously a kingdom and then a duchy, Brittany was united to the Kingdom of France in 1532 as a province. Brittany has also been referred to as Less, Lesser or Little Britain...

 to Wales and became a member of the college of Bardsey Island

Bardsey Island

Bardsey Island , the legendary "Island of 20,000 saints", lies off the Llŷn Peninsula in the Welsh county of Gwynedd. The Welsh name means "The Island in the Currents", although its English name refers to the "Island of the Bards", or possibly the island of the Viking chieftan, "Barda". It is ...

. He founded the church of Llandygai. In Achau y Saint, Tegai is called Tegai Glasog of Maelan.