Rhiwallon ap Cynfyn, Prince of Powys

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Rhiwallon ap Cynfyn

Birthplace: Powys, Wales
Death: Died in Montgomeryshire, Wales
Cause of death: Killed in Battle of Mechain
Immediate Family:

Son of Cynfyn ap Gwerstan, King of Powys and Angharad verch Maredudd, Queen of Powys
Husband of N.N. . verch Llewelyn
Father of Meilir Ap Rhiwallon; Sioned (Jonet) verch Rhiwallon; Rhirid Ap Rhiwallon and Gwladys verch Rhiwallon, Queen of Deheubarth
Brother of Gwenwyn verch Cynfyn; Bleddyn ap Cynfyn, King of Powys; Efa verch Cynfyn; Angharad verch Cynfyn; Llewelyn ap Cynfyn and 1 other
Half brother of Iwerydd verch Cynfyn and Gruffydd ap Llewellyn, king of the Britons

Managed by: Flemming Allan Funch
Last Updated:

About Rhiwallon ap Cynfyn, Prince of Powys

  • Rhiwallon ap Cynfyn

born about 1025 Powys, Wales died 1070 (slain) Battle of Mechain, Montgomeryshire, Wales


  • Cynfyn ap Gwerystan King of Powys

born about 1002 Powys, Wales


  • Angharad verch Maredydd

born about 0982 Deheubarth, Wales married 1023


  • Bleddyn ap Cynfyn born about 1025 Montgomeryshire, Wales died 1075
  • Miss verch Cynfyn born about 1024 Powys, Wales
  • Iwerydd verch Cynfyn born about 1024 Powys, Wales
  • Nest verch Cynfyn born about 1027 Powys, Wales

Gwerydd verch Cynfyn

spouse: unknown


  • Sioned (Jonet) verch Rhiwallon born about 1037? Powys, Wales
  • Gwladys verch Rhiwallon born about 1041 Powys, Wales

biographical and/or anecdotal:

notes or source: ancestry.com

The Battle of Mechain was fought in 1070 in Montgomeryshire, Wales, for rule of the Welsh kingdoms of Gwynedd and Powys.

After the murder of Gruffydd ap Llywelyn, Harold Godwinson married his widow Ealdgyth and divided Gruffydd's realm into the traditional kingdoms of Gwynedd and Powys, the rule of which were given to Bleddyn ap Cynfyn and his brother Rhiwallon ap Cynfyn. Gruffydd left two sons who in 1070 challenged Bleddyn and Rhiwallon at Mechain in an attempt to win back part of their father's kingdom. However, both of Gruffyd's sons were defeated, one being killed and the other dying of exposure after the battle.

Rhiwallon was also killed in this battle, leaving Bleddyn to rule Gwynedd and Powys alone.


Rhiwallon Ap Cynfyn became co-ruler of Gwynedd, Wales in 1063. He died in the Battle of Mechain.

A descendant of one branch of Rhodri The Great, he was a member of the House of Dinefwr. He ruled the Kingdoms of Gwynedd & Powys jointly with his brother, Bleddyn ap Cynfyn, as King of Deheubarth until his death in 1093 in the Battle of MeChain at the age of 45. His brother then ruled alone.

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Rhiwallon ap Cynfyn, Prince of Powys's Timeline

Powys, Wales
Age 10
Of, , Powys, Wales
Age 12
Powys, Wales
Age 14
Of, , Powys, Wales
Age 16
Powys, Wales
Age 45
Age 45
Age 45
Montgomeryshire, Wales
Age 45