A sixth-century Breton abbot, brother of Saints Gwenole and Guethenoc, who founded a monastery at what is now Saint-Jacut-de-la-Mer on the Brittany coast.

Saint Jacut was an abbot who lived in Brittany, in what is now northwestern France, during the sixth century, remembered as the brother of Saint Gwenole de Landevennec, founder of one of Brittany’s most important early monasteries, and of Saint Guethenoc. Jacut is associated with the coastal community that still bears his name, Saint-Jacut-de-la-Mer, where he is traditionally credited with establishing a monastic foundation as part of the wider wave of Breton monastic settlement carried out in this era by holy men connected to the same family and monastic circle as his more famous brother.

Quick Facts

• Era: 6th century
• Place: Saint-Jacut-de-la-Mer, Brittany, France
• Venerated as: Abbot
• Siblings: Saint Gwenole de Landevennec, Saint Guethenoc

Who Was Saint Jacut?

Jacut belonged to a family that produced several notable monastic founders in early Brittany, most prominently his brother Gwenole, who established the influential Abbey of Landevennec and became one of the most celebrated figures of early Breton monasticism. Jacut himself is remembered as founding a religious community along the northern Breton coast, in the area that has carried his name for well over a thousand years as Saint-Jacut-de-la-Mer, though the specific details of his rule and community life are not preserved beyond this foundational tradition.

Historical Setting

Sixth-century Brittany was undergoing a significant wave of Christian monastic settlement, much of it carried out by holy men and women, often members of the same extended families, who had emigrated from Britain amid the upheavals following the end of Roman rule there, bringing with them a distinctively Insular Celtic style of monasticism that would shape the religious landscape of Brittany for centuries. Jacut’s foundation belongs to this broader movement, closely tied to the network of monasteries his brother Gwenole and their wider circle established across the peninsula.

Why the Church Remembers Saint Jacut

The Church remembers Jacut as part of the founding generation of Breton monasticism, whose family’s combined labors helped establish a durable Christian presence along a coastline that would go on to produce a rich and distinctive regional monastic culture. His name, preserved in the coastal town that still honors him, testifies to the lasting local memory of his foundation.

Canonization and Feast Day

No formal canonisation process for Saint Jacut is recorded; his veneration is ancient and deeply rooted in Breton local tradition, sustained through more than a millennium of continuous devotion in the town that bears his name.

What Catholics Can Learn Today

Jacut’s place within a family of monastic founders is a reminder of how holiness has often flowered within families and close communities working together toward a shared purpose, each member contributing according to their own calling to a larger, lasting work.

A Prayer to Saint Jacut

Saint Jacut, faithful abbot of the Breton coast, watch over the communities and families who continue to build up the Church today, as you and your brothers once did along these shores. Amen.

Sources

• Butler’s Lives of the Saints
• Gallia Christiana