Magloire is a Breton

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...

 saint, one of a number attributed an origin the other side of the English Channel

English Channel

The English Channel , often referred to simply as the Channel, is an arm of the Atlantic Ocean that separates southern England from northern France, and joins the North Sea to the Atlantic. It is about long and varies in width from at its widest to in the Strait of Dover...

. He is traditionally given to be a relative of Samson of Dol

Samson of Dol

Saint Samson of Dol was a Christian religious figure who is counted among the seven founder saints of Brittany. Born in southern Wales, he died in Dol-de-Bretagne, a small town in north Brittany.-Life:...

, and his successor as bishop of Dol at the end of the seventh century. At the command of an angel, he gave up this position to Budoc

Budoc

Saint Budoc of Dol was a Bishop of Dol, venerated after his death as a saint in both Brittany and Devon . Saint Budoc is the patron of Plourin Ploudalmezeau in Finistère where his relics are preserved...

, and retired to the island of Sark

Sark

Sark is a small island in the Channel Islands in southwestern English Channel, off the French coast of Normandy. It is a royal fief, geographically located in the Channel Islands in the Bailiwick of Guernsey, with its own set of laws based on Norman law and its own parliament. It has a population...

. Contemporary opinion is that he was an Irish abbot, who died c. 575.

A Latin Vita Sancti Maglorii exists, of uncertain provenance. François Duine (1874–1924) called this work a masterpiece of ancient Breton literature. Scholars place its composition from the later ninth century, to the middle of the tenth century.