Galwyddel

Kingdom of Galwyddel
Late 400s–c.550
Other languagesCommon Brythonic
GovernmentMonarchy
King 
• Late 400s─Early 500s
Tudwal ap Cinuit
• Early 500s─Mid 500s
Dingat ap Tudwal
• Mid 500s─c.550
Senyllt ap Dingat
History 
• Established
Late 400s
• Death of Cinuit of Alt Clut
Late 400s
• Invasion by Urien of Rheged
c.550
Preceded by
Succeeded by
Kingdom of Alt Clut
Kingdom of Rheged
Ynys Manau
Today part of

Galwyddel was a Brythonic kingdom within the Hen Ogledd ("Old North") in Sub-Roman Britain. Its area corresponds to modern-day Galloway, Scotland. Galwyddel is believed to have split from the Kingdom of Alt Clut following the death of King Cinuit and his land's division between his sons: Dyfnwal Hen (who became King of Alt Clut); and Tudwal (who became the first King of Galwyddel). Galwyddel is believed to have maintained authority over the Isle of Man. Around 550, Galwyddel was invaded and annexed by the Kingdom of Rheged, under King Urien. The Galwyddel King, Senyllt, was forced to flee to Ynys Manau (Isle of Man).