More info about the name "Ollie"

Ollie is a diminutive of Oliver, or Olivia. Olivia originates in Latin language and means "olive". It was used for the first time by Shakespeare in his play Twelfth Night. He probably derived the name from the masculine Oliver, or simply the word 'olive'. In the English-speaking countries it has been used since the 18th century and currently is one of the most popular feminine given names in the United States. It also has many famous bearers, including the Australian singer and actress Olivia Newton-John, as well as the American actress Olivia Wilde.