Gertrude Gadwall
Gertrude Gadwall is a
fictional character of the
Scrooge McDuck universe created by
Don Rosa for
The Walt Disney Company. She is only featured in his family tree of
Donald Duck's relatives. She is featured as the wife of
Clinton Coot, mother of
Elvira Coot (also known as
Grandma Duck) and
Casey Coot, grandmother of
Quackmore Duck,
Daphne Duck,
Eider Duck,
Cuthbert Coot and
Fanny Coot, great-grandmother of
Donald Duck,
Della Thelma Duck,
Gladstone Gander,
Abner Duck,
Fethry Duck,
Gus Goose and possibly
Kildare Coot, and finally great-great-grandmother of
Huey, Dewey and Louie and possibly
Dugan Duck.