Bro Morgannwg NHS Trust was an NHS Trust based in Bridgend, Mid Glamorgan.
His bardic name is Welsh for "Iolo of Glamorgan" (the county's name is spelt "Morgannwg" in modern Welsh).
Meurig, son of King Hywel of "Morgannwg" (actually, only part of Glywysing), was said to have joined Rhodri the Great in defeating them but to have fallen in the battle.
There are references to Illtud being the cousin of Athrwys ap Meurig of Morgannwg although there is no known connection with Sadwrn.