his birthday is younger then his daughter

Alexander, that would seem sensible however do you have any sources to back this up? or is it a guesstimate?

if he died of old age, he was born longer ago than 1090.

also Afreca birthdate here would exclude Elizabeth (Joan) from being her mother, so her mother is unkown.

if he died of old age, he was born longer ago than 1090.

also Afreca birthdate here would exclude Elizabeth (Joan) from being her mother, so her mother is unkown.