Various, Notes and Queries, Number 195, July 23…
“ The two instances cited by him are rather unfortunate, the connexion of both ladies with royalty being sufficiently close to suggest the possibility of their right to the "full and complete" shield.Margaret, Duchess (not Countess) of Norfolk, was sole heir of her father, Thomas of Brotherton, fifth Earl of Norfolk, son of King Edward I., and Marshal of England. She, "for the greatness of her birth, her large revenues and wealth," was created Duchess of Norfolk for life ”
