Born Genevieve O'Neill in Baltimore, she was the daughter of pulmonary specialist Dr. John O'Neill. Her mother died when she was a baby. An aunt, M. Genevieve Thuman, a Johns Hopkins librarian, raised her at the family's Mount Washington home.
She was a 1941 graduate of the old Mount St. Agnes High School in Mount Washington, where she earned a diploma at its junior college. Mrs. Williams studied in Grenoble, France, and earned a bachelor's degree from what is now Towson University. She remained fluent in French throughout her life.
In 1945, she married Charles "Gene" Williams, a Navy veteran who became the president and board chairman of Baltimore Federal Savings and Loan Association.
She enjoyed traveling and attended her children's recreation league, high school and college sports events. She also played bridge. She played the piano and sang alongside her children in their band, The Objections. She also sang with a family group, the Joe-Ettes.
A memorial service will be held at noon May 26 at Oregon Ridge Lodge in Oregon Ridge Park in Hunt Valley.
Survivors include three sons, John Williams of Bowie, Timothy Williams of Lutherville and Joseph Williams of Hunt Valley; a daughter, Ann Williams of Towson; 11 grandchildren; and five great-grandchildren. Her husband of 29 years died in 1974. A daughter, Susan Williams Cunningham, died in 1971.