The Men of Lleyn - How They Got There
This paper suggests that a young man of Rhos
married the heiress of Merfyn ap Rhodri Mawr, and that she carried Lleyn to her son, the ancestor of Collwyn ap Tangno.
The Betrayal of Meirion Goch Revisited
Discusses the medieval claim that this man betrayed
Gruffudd ap Cynan of Gwynedd, and refutes that claim using logical arguments and chronological analysis.
Gwyn Ddistain, Seneschal for Llewelyn Fawr
Untangles two different men named Gwyn in the
extended family descended from Collwyn ap Tangno, one of whom served the king of Gwynedd as his seneschal.
Trahaearn Goch of Lleyn
In this paper, we show why his pedigree is often
conflated with an earlier "Trahaearn ap Madog" who descended from Rhys ap Tewdwr of Deheubarth.