is possible, because of internal inconsistencies, that the poetry connected to Powys was associated with Llywarch's name at a later, probably 9th century, date. Llywarch is referred to in some poems as king of South Rheged, and in others as king of Argoed, suggesting that the two regions were the same. Searching for Llywarch's kingdom has led some historians to propose that Rheged may have been divided between sons, resulting in northern and southern successor states. The connections of the family of Llywarch and Urien with Powys has suggested to some, on grounds of proximity, that the area of modern Lancashire may have been their original home. End of Rheged After Bernicia united with Deira to become the kingdom of Northumbria, Rheged was annexed by Northumbria, some time before AD 730. There was a royal marriage between Prince (later King) Oswiu of Northumbria and the Rhegedian princess Rieinmelth, granddaughter of Rum (Rhun), probably in 638, so it is possible that it was a peaceful takeover, both kingdoms being inherited by the same man. After Rheged was incorporated into Northumbria, the old Cumbric language was gradually replaced by Old English, Cumbric surviving only in remote upland communities. Around the year 900, after the power of Northumbria was destroyed by Viking incursions and settlement, large areas west of the Pennines fell without apparent warfare under the control of the British Kingdom of Strathclyde, with Leeds recorded as being on the border between the Britons and the Norse Kingdom of York. This may have represented the political assertion of lingering British culture in the region. The area of Cumbria remained under the control of Strathclyde until the early 11th century when Strathclyde itself was absorbed into the Scottish kingdom. The name of the people, whose modern Welsh form is has, however, survived in the name of Cumberland and now Cumbria; it probably derives from an old Celtic word *Kombroges meaning "fellow countrymen". Discovery of a lost stronghold of Rheged Previously, Rheged was assumed to have been centred somewhere in Cumbria, northwest England. However, in 2012 archaeologists found evidence at Trusty's Hill near the town of Gatehouse of Fleet, in Galloway, southwest Scotland, suggesting that the site may in fact have been Rheged's capital . The discovery was announced to the public in January 2017 and the site is still under excavation. One of the lead researchers, Ronan Toolis, stated that their findings revealed