Very little is known about Brioc's early life, as his 9th century
Acta is not altogether reliable. It states that he came from
Ceredigion where the church at
Llandyfriog was originally dedicated to him. He received his education in Ireland and then studied under
Germain of Paris. He is believed to have spent time at
Rothesay on the Isle of Bute in Scotland, where a church was dedicated to him and his name was commemorated in the annual St. Bruix Fair. At some point in the sixth century, he settled in Armorica, and founded a monastery at Landebaeron. He then traveled to Upper Brittany where he established an
oratory at
St Brieuc-des-Vaux, between St. Malo and Land Triguier, where he eventually became the
abbot of a monastery. Authorities differ as to date of Brioc's death, but it was probably in the late sixth century. He died in his own monastery at St. Brieuc-des-Vaux and was interred in his cathedral church, dedicated to
Saint Stephen. ==Veneration==