Iodocus

Iodocus is a Latinized form of the Breton name Judoc, itself derived from the Old Breton element iud, meaning lord or chief. The name was borne by a seventh-century Breton prince and hermit saint who became venerated across Britain and parts of continental Europe, lending the name considerable medieval popularity. The anglicized form Joyce developed from this same root through Norman transmission, and the related spelling Josse also circulated widely in medieval France and the Low Countries.