I think this is more correct
Fergus of Galloway
Lord i Galloway, Scotland.
Born: 1070 Skottland, Galloway Dead 1161 Skottland, Edinburg
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.