Peibio Clafrog

Peibio Clafrog (also known as Pepiau Glavorawc, or in Latin, Pepianus Spumosus) was King of Ergyng in southeast Wales during the 5th or 6th century. He is chiefly known from the legends surrounding Saint Dubricius, who was said to be his grandson. The contemporary form of his name appears to be Peibio, as preserved in place-names such as Garthbeibio in Montgomeryshire and Ynys Beibio near Holyhead.