olivier or oliver, is believed to derive from the "Alf" and "Ihar", meaning "Elf Army" however that may not be the case, so you should supplement this answer with your own research
Olivier is the French and Dutch form of Oliver, meaning "olive tree."
Olivier O. Olivier has written: 'Peintures et dessins'
Olivier Goinard goes by Olivier Dorigan.
Laurence Olivier Olivier has written: 'Confessions of an actor' -- subject(s): Actors, Biography
Olivier Tangkun's birth name is Olivier Tangkun.
Olivier Megaton's birth name is Olivier Fontana.
Olivier Doran's birth name is Dorangeon, Olivier.
Olivier Picasso's birth name is Olivier Widmaier-Picasso.
Laurence Olivier's birth name is Laurence Kerr Olivier.
Olivier Rawlings's birth name is Olivier William Rawlings.
Olivier Panis's birth name is Olivier Denis Panis.
Olivier Janiak's birth name is Piotr Olivier Janiak.