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Birth:          ABT  980 of Rhuddlan, Flintshire, Wales
Death:          1023 

Notes
https://en.wikipedia.org/wiki/Llywelyn_ap_Seisyll
Llywelyn ap Seissyll (died 1023) was an 11th-century King of Gwynedd, Powys and 
Deheubarth.

Llywelyn was the son of Seisyll, a man of whom little is known. Llewellyn first appears 
on record in 1018, that year he defeated and killed Aeddan ap Blegywryd along with 
four of his sons and obtained Gwynedd and Powys.

In 1022, a man named Rhain the Irishman was made king of Deheubarth, he claimed 
to be a son of Maredudd ab Owain, whose daughter Angharad had married Llywelyn. 
Llywelyn made war against Rhain, they fought a battle at Abergwili, and after a 
“slaughter on both sides” Rhain was killed allowing Llywelyn take control of 
Deheubarth.

Llywelyn, after his success against Rhain, died in 1023. The Brut y Tywysogion 
portrays Llywelyn’s reign as one of prosperity saying “complete in abundance of wealth 
and inhabitants; so that it was supposed there was neither poor nor destitute in all his 
territories, nor an empty hamlet, nor any deficiency.” Llywelyn was called "King of the 
Britons" by the Annals of Ulster.

Llywelyn had one son called Gruffydd; he did not succeed his father, possibly because 
he was too young to do so. Gruffydd went on to become the first King of Wales, 
however he was killed by his own men in 1063. Gruffydd’s own sons Maredudd and 
Idwal died in 1069, fighting at the Battle of Mechain.

Parents
AP EDNYWAIN Seisyll (ABT  938 - )
VERCH ELISE Prawst (ABT  940 - )

Siblings
AP SEISYLLT Llywelyn (ABT  980 - 1023)

Marriage To VERCH MAREDYDD Angharad (ABT  982 - )
    m.  

Notes

Parents
AP OWAIN Maredydd (ABT  938 -  999)
----- ----- ()

Children by VERCH MAREDYDD Angharad ABT  982 - 
AP LLEWELYN Gruffydd (ABT 1011 - 5 Aug 1063)

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