The land was allegedly founded by
Caradog Strongarm. In the early 6th century,
Macliau served as one of the earliest
bishops of Vannes prior to usurping his nephew's inheritance in neighboring
Cornouaille. or simply the refugee guest of
Conmor. Major settlements at this time included Gwened (
Vannes) and Lokmaria (
Locmaria). In the mid-7th century, Bro Gwened was united with
Domnonia under its king
Saint Judicaël, who was descended from a daughter of Budic II. Domnonia's rulers thenceforth reigned as the
high kings of
Brittany, with Bro Gwened forming part of their lands. ==Dialect==