additional

Additional information Seisyll:

additionalOld Welsh form of SEXTILIUS

wiki

Wiki information Seisyll:

Llywelyn ap Seisyll
Deceased Person, Person

Llywelyn ap Seisyll was an 11th-century king of Gwynedd and Deheubarth in present-day Wales. He was noted as "King of the Britons" in the Irish Annals of Ulster.

Seisyllwg
Location, Dated location

Seisyllwg was a petty kingdom of medieval Wales. It is unclear when it emerged as a distinct unit, but according to later sources it consisted of the former Kingdom of Ceredigion plus the region known as Ystrad Tywi. Thus it covered the modern county...