As per the Patron Saint Index and other sources, 'Saint' Olivia (Olive) never existed. She was the central character in a pious story circulating in the early Church that was mistaken to be a biography. Her feast day has been stricken from the Calendar of Saints.
St. Olive, Olivia de Palermo, was a fictional character who achieved a large following when her story was mistaken for a biography. She never existed.
There's one in France
Olive Smith died in 1993.
Olive Morris died in 1979.
Olive Stone died in 1977.
Olive Biller died in 1957.
Olive Cotton died in 2003.
Olive Wilton died in 1971.
Olive Anstey died in 1983.
Olive Shapley died in 1999.
Olive Fremstad died in 1951.
Olive Price died in 1991.
Olive Percival died in 1945.