Ollie is the pet form of Oliver, which most likely comes from the Old French Olivier and the Latin oliva, so it means "olive tree", a symbol of peace. In England Ollie has ranked among the top 100 boys' names on its own for years, and American parents have begun to use it as a full name too. Ollie has climbed from number 1597 in 2016 to number 1058 in 2025, close to its best rank of number 1024 in 2022.