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.
There's one in France
Philippe Olive died in 1981.
Les Olive died in 2006.
Olive Dennis died in 1957.
Olive Wilton died in 1971.
Olive Cotton died in 2003.
Olive Wadham died in 2004.
Olive Oatman died in 1903.
Olive Wheeler died in 1963.
Olive Smith died in 1993.
Olive Morris died in 1979.
Olive Shapley died in 1999.