Maredudd ap Llywelyn ap Maredudd ap Cynan was the only known son of Llywelyn the Elder

Llywelyn the Elder ap Maredudd ap Cynan ab Owain Gwynedd

Llywelyn Fawr or Llywelyn ap Maredudd ap Cynan ab Owain Gwynedd was a second-cousin of Gruffudd ap Llywelyn and Dafydd ap Llywelyn of the royal house of Gwynedd in the 13th Century...

 and was a great-great-grandson of Owain Gwynedd

Owain Gwynedd

Owain Gwynedd ap Gruffydd , in English also known as Owen the Great, was King of Gwynedd from 1137 until his death in 1170. He is occasionally referred to as "Owain I of Gwynedd"; and as "Owain I of Wales" on account of his claim to be King of Wales. He is considered to be the most successful of...

, an important prince of north Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 in the 12th Century. This obscure Welsh prince is important in so far as his descendants outlived most of their other relatives who perished during the campaign of Edward I

Edward I of England

Edward I , also known as Edward Longshanks and the Hammer of the Scots, was King of England from 1272 to 1307. The first son of Henry III, Edward was involved early in the political intrigues of his father's reign, which included an outright rebellion by the English barons...

 to subjugate Wales and destroy the royal house of Gwynedd

Kingdom of Gwynedd

Gwynedd was one petty kingdom of several Welsh successor states which emerged in 5th-century post-Roman Britain in the Early Middle Ages, and later evolved into a principality during the High Middle Ages. It was based on the former Brythonic tribal lands of the Ordovices, Gangani, and the...

. Maredudd ap Llywelyn is thought to have been the vassal

Vassal

A vassal or feudatory is a person who has entered into a mutual obligation to a lord or monarch in the context of the feudal system in medieval Europe. The obligations often included military support and mutual protection, in exchange for certain privileges, usually including the grant of land held...

 Lord of Meirionydd

Merionethshire

Merionethshire is one of thirteen historic counties of Wales, a vice county and a former administrative county.The administrative county of Merioneth, created under the Local Government Act 1888, was abolished under the Local Government Act 1972 on April 1, 1974...

 and died in 1255. He is known to have had only one son; Llywelyn

Llywelyn ap Maredudd ap Llywelyn ap Maredudd ap Cynan

Llywelyn ap Maredudd was a minor Welsh prince of the House of Gwynedd who was the last vassal Lord of Meirionydd. He lived during the mid 13th century. He was the son of Maredudd ap Llywelyn ap Maredudd ap Cynan and was a direct descendant of Owain Gwynedd through his son Prince Cynan, Lord of...

.