Congar grew up in Pembrokeshire and travelled across the Bristol Channel to found a monastery on Cadbury Hill at Congresbury in Somerset.

The parish of Congresbury claimed to have enshrined Congar's body during the Middle Ages, and mentioned it in several pilgrim guides.

Congresbury itself is first mentioned in Asser’s Life of Alfred as a derelict Celtic monastery, probably related to Congar.

Though a minor saint, he is mentioned in a litany of Winchester in about 1060, and his feast day was recorded in most medieval Somerset calendars.

[1] Churches dedicated to Congar may also be found in Brittany and Cornwall, where he is said to have been a hermit at St Ingunger, in the parish of Lanivet.