Frances P. Zello, 93, who did bookkeeping work in the Washington area from the mid-1950s through the 1970s, died April 4 at her home in Kensington.

She had cardiovascular disease and dementia, said her daughter, Patty Zello.

Mrs. Zello retired from Councilor, Buchanan and Mitchell, an accounting firm in Bethesda, where she had worked as a financial proofreader for more than a decade. She had previously done accounting and bookkeeping work for private clients from her home.

Frances Ann Bednarko was born in Duluth, Minn. For most of her early life, she was known as Frances Pernala after taking her stepfather’s last name. She settled in the Washington area around 1940.

Her memberships included the Italian club at the Margaret Schweinhaut Senior Center in Silver Spring and Holy Redeemer Catholic Church in Kensington, where she sang in the choir. Along with her husband, she participated in activities of the Knights of Columbus and the American Legion.

Her husband of 69 years, Frank Zello, died in 2012. Survivors include two children, Patty Zello of Kensington and James Zello of Silver Spring; two grandchildren; and two great-grandchildren.

— Emily Langer