||Madog ap Maredudd was a member of royalty, nobility or aristocracy in Wales in the Middle Ages.|
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Cymraeg: Madog ap Maredudd, brenin of Powys (d.1160)
English: Madog ap Maredudd, king of Powys
Prince of Powys-Vadawc
While ancestors and descendants are known most as Princes of Powys, Madog ap Maredudd was known as Prince of Powys-Vadawg, a cantref later incorporated into Montgomeryshire.
He was the son of Maredudd ap Bleddyn 
Maredudd ap Bleddyn ap Cynfyn.
1025 Bleddyn ap Cynfyn (obit 1075).
. 1065 Maredudd (obit 1132)
.. 1098 Madog (obit 1160)
... 1130 Gruffudd Maelor I ap Madog (obit 1191)
.... 1160 Madog ap Gruffydd Maelor (obit 1236)
..... 1195 Gruffudd Maelor II (obit 1269)
He succeeded his father in 1132 as Prince of Powys. 
He was the last of his dynasty to rule as king over the whole of Powys , including, for a time, the Fitzalan lordship of Oswestry (see Owain Brogyntyn ). 
Succeeding his father in 1132 , his main pre-occupation, particularly between the years 1149-57 , was the defence of Powys against the aggression of Owain Gwynedd (q.v.) . Threatened by the building of the castle of Tomen-y-Rhodwydd at the southern end of the Vale of Clwyd , Madog , in alliance with Ranulf , earl of Chester , unsuccessfully challenged Owain 's advance, losing, for a time, the control of his lands in Iâl . This loss was retrieved in 1157 when Henry II , with Madog 's support, made a decisive assertion of authority in North Wales . When he d. three years later he was still friendly with his powerful patron. 
To combat Owain Gwynedd's advances into Powis, Madog first allied with Ranulf, earl of Chester. It failed. His later alliance with Henry II was successful.
The Chronicle of the Princes of Wales records that "Madog son of Maredudd built the castle of Oswestry" in 1148 and "gave Cyveiliog to his nephews Owain and Meurug, the sons of Gruffudd son of Maredudd". 
He married Susann of Gwynedd, daughter of Gruffydd ap Cynan King of Gwynedd & his wife Angharad of Deheubarth. 
While several sources identify Susanna as the daughter of Owain Gwynedd   Cawley in Foundation for Medieval Genealogy asserts that she was the daughter of Gruffydd ap Cynan (not ‘ Owain Gwynedd ’)
Madog is also shown in some genealogies as the husband of Efa (Eirian) ferch Madog. She apparently was a mistress of Madog, but not married to him. She has been delinked as a spouse but remains mother of shome of Madog's children.
Madog ap Maredudd died in 1161 and was buried in Meivod.
The Annales Cambriæ record the death in 1161 of "Madoc filius Maredut Powysorum princeps". 
The Chronicle of the Princes of Wales records that "Madog son of Maredudd Lord of Powys" died in 1159 and was buried "at Meivod". 
He was buried in the mother-church of Powys — S. Tysilio at Meifod . 
bur. mother church of Powys, St Tysillio at Melfod.
His praises were sung by the leading poets of the day, and the impression created on the minds of contemporaries by the influence which he asserted in central Wales is enshrined in contemporary prose romances. 
contemporary poets sang Madog's praises and characterized him in prose romance.
His dominions were divided among his sons and nephews: Gruffydd Maelor I, Owain Fychan, Owain Brogyntyn, and Owain Cyfeiliog.
His dominions were divided among a number of minor lords of Powys — his sons and nephews — and were never again to be reunited in the hands of a single ruler. (For his heirs see Gruffydd Maelor I , Owain Fychan , Owain Brogyntyn , and Owain Cyfeiliog ).
Madog & his wife had four children: 
Madog had three illegitimate children by unknown mistresses:
Courtesy of fantastically full family tree cf.:
Hughes of Gwerclas 1/2/3/4:
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On 2 Oct 2016 at 12:52 GMT Magnus Sälgö wrote:
Madog is 24 degrees from Kevin Bacon, 23 degrees from Joseph Broussard, 30 degrees from Helmut Jungschaffer and 22 degrees from Queen Elizabeth II Windsor on our single family tree. Login to find your connection.