Raised on Mill Creek Road in Ardmore, she was the daughter of the architect Albert F. Dagit. Mrs. Muldoon graduated from Merion Mercy Academy and went on to Rosemont College.
She married Joseph B. Muldoon, a financial analyst for Janney Montgomery Scott. They settled in Ardmore to raise a family. After his death in 1987, she moved to Wynnewood.
Mrs. Muldoon's outsize personality had a profound effect on people. Her daughter, Michell, said Mrs. Muldoon and Michell's late husband, Steve Friedman, a call-in radio host known as "Mr. Movie," would spar over his taste in films.
"She used to challenge him on every detail," Michell Muldoon said. Both had dominant personalities and viewed the cinema differently. "They were hysterically funny together."
Four years ago, on a trip to Europe, Mrs. Muldoon talked a theater manager in London into letting her sit in the empty box held for the queen because no seats were available in the packed house. Mrs. Muldoon cut a queenly figure from the monarch's box.
She lived life on her own terms, and was courageous, strong, outspoken, dynamic, elegant, and beautiful.
"She was from a generation of women who had to change the world while wearing white gloves," her family said. While the gloves stayed on, she handled the details that make projects work and the wheels of life keep rolling, her family said.
Besides her daughter, she is survived sons Joseph B. III and William; daughters Marion Franklin and Madeline; five sisters; a brother; 11 grandchildren, and five great-grandchildren.
A daughter, Margaret Sharkey, died earlier.
Services were Saturday.
Donations may be made to the Salvation Army, Greater New York Division, 120 W. 14th St., New York, N.Y. 10011.