In the 1901 census 85 Coleshill Buildings [This is a few doors down from Florence’s future husband’s uncle Alfred Stuart Symondson at 104 Coleshill Buildings], Belgrave, St. George Hanover Square, London.
Head John Mahoney [as spelled], age 30, paperhangings salesman, born Chelsea, London.
Wife Alice Mahoney, age 24, born Pimlico, London.
Daughter Ethel Mahoney, age 5, born Pimlico.
Daughter Florence Mahoney, age 4, born Pimlico.
Son William Mahoney, age 2, born Pimlico.

In the 1911 census 37 Commercial Road, Pimlico SW London.
Head John William Mahony, age 40, painter, born Chelsea, London.
Wife Alice Mahony, age 35, married 16 years, 4 children born alive, all living, born Pimlico, London.
Daughter Ethel May Mahony, age 15, dressmaker, born Pimlico.
Daughter Florence Winnifred Mahony, age 14, born Pimlico.
Son William James Mahony, age 12, born Pimlico.
Daughter Ivy Beatrice Mahony, age 2, born Pimlico.
Their dwelling has 2 rooms.

England and Wales June 1970 death index William James Mahony, born December 9, 1898 died age 71, Westminster, London, volume 5e, page 2024