Ynys Manau
Ynys Manau was a Brythonic kingdom that variously ruled over the Isle of Man from around 550 AD until 825 AD.
History
Ynys Manau was originally a territory of the Kingdom of Galwyddel until the mainland was invaded by the Kingdom of Rheged under Urien around 550 AD. The King of Galwyddel, Senyllt ap Dingat, was forced to flee to the Isle of Man, where he established a lineage of kings.In 578, during or following the reign of King Neithon ap Senyllt, Ynys Manau was occupied by the Kingdom of Ulaid under its king, Báetán mac Cairill. This was until 582 when the Kingdom of Dál Riada took control of the island under its king, Áedán mac Gabráin. At some point in the late 500s, Neithon's son Rhun ap Neithon regained control over Ynys Manau, re-establishing the Brythonic Kingdom.
The Isle of Man came under the rule of Edwin, King of Bernicia and Deira, from 620 to 633.
The lineage of Senyllt ap Dingat continued to rule an independent Ynys Manau until 825, when Merfyn Frych became King of Gwynedd and incorporated the Isle of Man into that kingdom.