List of Monarchs of Britain (They Are Protected)

List of rulers of

House of Gwynedd

 * Llywelyn I (1224-1240)
 * David I (1240-1266)
 * Llywelyn II (1266-1298)
 * Griffith I (1298-1331)

House of Powys

 * Constantine I (1331-1353)
 * Griffith II (1353-1371)
 * Owen I (1371-1416)
 * Griffith III (1416-1428)
 * Constantine II (1428-1442)
 * Constantine III (1442-1478)

House of Rheged

 * Owen I (1478-1521)
 * Howel I (1521-1563)
 * Howel II (1563-1588)
 * Griffith IV (1588-1602)
 * Constantine IV (1602-1612)
 * Gerontius I (1616-1655)

House of Dyfed

 * Constantine V (1655-1683)
 * Constantine VI (1683-1714)
 * Howel III (1714-1739)
 * Gerontius II (1739-1772)
 * Llywelyn II (1772-1806)
 * Llywelyn III (1806-1847)
 * Constantine VII (1847-1891)
 * Gerontius III (1891-1936)
 * Constantine VIII (1936-1965)
 * Constantine IX (1965-1998)
 * Constantine X (1998-date)