Cungar was traditionally born in Llanwngar in Pembrokshire in the late 5th century. It seems that he should not be identified with St. Cyngar of Llangefni as their feast days are different. The latter was the son of King Gerren Llyngesog of Dumnonia, but Cungar may perhaps be the grandson of King Ceredig Ceredigion named in the Bonedd y Saint as father of Saints Gwynlleu and Cyndeyrn. His father was Prince Garthog.
It appears that Cungar left Wales at a young age and crossed the Bristol Channel, settling at Congresbury in Somerset. He apparently turned the surrounding marsh into fertile farmland, thus attracting many followers to his side. Tradition holds that Congresbury became the centre of a West Country See, a precussor of Wells, and that Cungar was its first Bishop. But he was desirous of a solitary life once more and felt himself recalled to Wales. There, he founded a monastery in Morgannwg. The 16th century publisher of his "Life" wrongly identified this as Llandochau (Llandough-juxta-Cardiff) and perpetuated the myth that St. Dochau was an alternative name for Cungar. This is incorrect.
Cungar may have spent some time in Cornwall and Brittany where churches dedicated to him may still be found. Though there may have been a third Breton Saint of a similar name.
He died, on a pilgrimage to Jerusalem, on 27th November, supposedly in AD 520, and was buried in his foundation at Congresbury.
Propers for Cungar of Congresbury - Monastic and Bishop
O God, whose blessed Son became poor that we through his poverty might be rich: Deliver us, we pray thee, from an inordinate love of this world, that, inspired by the devotion of thy servant Cungar., we may serve thee with singleness of heart, and attain to the riches of the age to come; through the same thy Son Jesus Christ our Lord, who liveth and reigneth with thee, in the unity of the Holy Ghost, one God, now and for ever. Amen.
The Lesson - Song of Solomon 8:6-7
The Holy Gospel - St. Luke 12:33-37