King Gwrfoddw (Latin: Gurvodius rex Ercyg, died c. 619) was the King of Ergyng, a south-east Welsh kingdom of the early medieval period.
According to the Book of Llandaff, Gwrfoddw was victorious against the Anglo-Saxons and granted lands on the Wye to the Bishops of Ergyng in thanks.
Scholars Rachel Bromwich and D. Simon Evans note that Gwrbothu Hen, a brother of King Arthur's mother who was killed by Twrch Trwyth in the 11th/12th century Welsh text Culhwch and Olwen, may refer to Gwrfoddw.
[1] Later legendary genealogies fix him and his brothers Llygadrudd Emys, Gweir Paladr Hir, and Gweir Gwrhyd Ennwir as sons of Amlawdd Wledig.
[2] The Arthurian legends are generally set in the late 5th or early 6th century, some time before Gwrfoddw, though medieval stories are not always precise with their chronology.