page_title: Powys Fadog
section_title: Progeny of the Princely House
hierarchical_section_title: Powys Fadog / Progeny of the Princely House
context_page_description: Powys Fadog was the northern portion of the former princely realm of Powys, which split in two following the death of Madog ap Maredudd in 1160. The realm was divided under Welsh law, with Madog's nephew Owain Cyfeiliog inheriting the south and his son Gruffydd Maelor I, who inherited the north.
  Gruffydd received the cantref of Maelor and the commote of Iâl as his portion and later added Nanheudwy, Cynllaith, Glyndyfrdwy and Mochnant Is Rhaeadr. This northern realm became known as Powys Fadog after the accession of his son Madog ap Gruffudd in 1191 who reigned until 1236, and after whom it may be named. During his reign, Madog initially adopted a neutral position between Gwynedd and England but by 1215 had settled on an alliance with Llywelyn ab Iorwerth of Gwynedd. This policy of alliance with Gwynedd continued under his successor Gruffudd II over his thirty-three year reign. This alliance was formalised when Powys Fadog became vassal of Llywelyn ap Gruffudd in his role as Prince of Wales under the terms of the Treaty of Montgomery in 1267.
context_section_description: Direct patrilineal descendants of Owain Brogyntyn (fl. 1180) the youngest son of Madog ap Maredudd were the hereditary lords of Edeirnion who during the 12th and 13th-centuries usually ruled as subjects of the prince of Gwynedd, whose homage was bought by the princes of Powys Fadog. This cadet branch of the House of Mathrafal survived the purges which eradicated most of the Welsh royalty in the 13th and 15th centuries. Proven descendants of his were listed in Burke's Peerage & Gentry in the late 19th century as hereditary barons of Cymmer yn Edeirnion and Jones of Faerdref Uchaf have survived into the modern era.
caption: Arms of William Hughes of Gwerclas, Baron of Cymmer yn Edeirnion c.1840