Rose Quimby

Rose Quimby, also known as Daisy Quimby, is mother of Mayor Joe Quimby and matriarch of the Quimby family.

History
She attended the wedding of Rainier Wolfcastle and Maria Shriver-Kennedy Quimby.

Non-canon
When Bart Simpson cuts class, he sneaks into Freddy Quimby's 18th birthday party at the Quimby Compound. Mayor Quimby introduces Bart to her.

Behind the Laughter
As the Quimby family is a parody of the Kennedy family, an American political dynasty, Rose Quimby parodies the Kennedy family matriarch Rose Kennedy. In The Simpsons: A Complete Guide to Our Favorite Family, Rose Quimby is referred to as "Benefactor: Daisy, the never-seen Quimby matriarch."