Osborn Wyddel

[5] The circumstances of Osborn's settlement in Ardudwy (North-west Merionethshire) are unknown, though it may be conjectured that he was driven to seek a home in Wales by the temporary overthrow of the Geraldine influence in Desmond which followed the Battle of Callan (1261).

A spot called Berllys (or Byrllysg), a little to the north of Cors y gedol, is pointed out as the site of Osborn's first residence.

[10] Genealogists have noted with certainty that Osborn's ancestry was to have descended through numerous Irish Fitz families of Norman-Irish descent; starting with magnate Roger de Montgomery a Norman Knight who fought in the Battle of Hastings, himself a descendant of Danish and Swedish royalty.

Then it's speculated that Roger's descendant, Walter FitzOther married Gladys ap Conwym the daughter of a Welsh Prince.

[11] The Norman-Irish families continued to establish themselves after the Norman invasion; the 1st Lord of Offaly was established as the ancestor of the Duke's of Leinster in Dublin, Osborn's father has been noted as John FitzThomas, 1st Baron Desmond a man who he fought alongside at the Battle of Callann.