Gwerthefyr (Vortepor the Tyrant) ab Aergul Brenin Dyfed 
Gwerthefyr, known as Vortepor the Tyrant, was born in Dyfed, Cymru.1 Vortepor the Tyrant's father was Aergul Lawhir ap Triffyn Farfog Brenin Dyfed and his mother was <Unknown>. His paternal grandparents were Tryffin (The Bearded) Farfog mac Aed Brosc Brenin Dyfed and Gwledyr ferch Clotri Tywysoges Demetia. He was an only child.General Notes
Sources:
1. Repository:
Title: David Nash Ford, Early Brittish Kingdoms: Geneaologies: Mid-South Welsh Royal Pedigrees, 2000
Note:
Source Media Type: Book
2. Repository:
Title: History Files
Publication:
Note:
Source Media Type: Book
3. Repository:
Title: Early Welsh Geneaological Tracts
Author: Peter C. Bartrum
Publication: Cardiff, 1960
Page: Genealogies from Harleian MS 3859, "Guortepir map Aircol"
4. Title: Welsh Genealogies AD 300-1400
Author: Peter Clement Bartrum
Publication: 8 Vols. Cardiff, 1974, microfiche edition, 1980
Page: Dyfed p.20
Details of Vortepor the Tyrant's family with <Unknown>
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