Iorwerth Drwyndwn ap Owain Gwynedd Prince of North Wales
- Marriage (1): Marared ferch Madog ap Maredudd
- Died: Abt 1174
Other names for Iorwerth were Iorwerth ap Owain Gwynedd Prince of North Wales and Iorwerth ap Owen Gwynedd Prince of North Wales.
Source: A History of Wales by John Davies, London, 2007, p.80
Wikipedia - Llywelyn the Great
Source: Ancestral Roots of Certain American Colonists Who Came to America before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr, ed. by William R. Beall & Kaleen E. Beall, Baltimore, 2008, Line 176B-26.
Iorwerth married Marared ferch Madog ap Maredudd, daughter of Madog ap Maredudd ap Bleddyn Ruler of Powys and Susanna ferch Gryffydd ap Cynan.