Brychan

King of Brycheiniog in the 5th century A.D., known as Brychan Brycheiniog. 
Brychan, originally from Ireland, was the son Anlach, an Irish settler who had peacefully taken control of the area by marrying Marchell, the heiress of Garth Madrun, to his son. As his wife's dowry, together they inherited the lands of Garth Madrun. Brychan married and had three wives, 24 daughters, and 24 sons, in his royal residence at Talgarth. 
Being that he was born in Ireland, the son of a Prince Anlach, son of Coronac, his original name was Irish prior to being called Brychan, which is a Welsh name. 
Irish: Breccan or Broccan Also: Breccan Brychan