Seigneur of Lusignan and Count of La Marche from 1219.
Second wife of King john.
Countess of Angouleme in her own right from 1202.
Queen consort of England from 1200 to 1216
Countess of La Marche from 1220
Originally betrothed to Hugh IX of Lusignan
Married at the age of 12 to John
Married Hugh X of Lusignan, the son of Hugh IX, in 1220. She did so without the permission of the king’s council in England.
Known as a blonde blue eyed beauty whose temper matched King John’s.
After her husband King John died and the coronation of her nine year old son Henry III, she returned to Angouleme to take control of her inheritance.
She had 14 children. 5 of John’s and 9 of Hugh’s.
Was a bitter enemy of Blanche Dowager Queen of France who
1) was involved in trying to make her husband King Louis VIII of France also King of England instead of Isabella’s husband John and later their young son King Henry III of England
2) snubbed Isabella after her return to France.
There is said to be an unconfirmed plot in 1244 by Isabella to poison Blanche. After the failure of this plot Isabella fled and sought refuge in Fontevraud Abbey
Wikipedia:
https://en.wikipedia.org/wiki/Isabella_of_Angoul%C3%AAme