Ollie is of Latin origin, derived from the olive tree. It was traditionally used as a nickname for Oliver, meaning "olive tree". In recent years, it has gained popularity as a unisex given name in its own right. The name Ollie is often associated with simplicity and nature, perhaps due to its derivation from the olive tree.
"Ollive was quite popular around the turn of the century, with seven newborns bearing this unique name in 1909. However, its popularity waned by the mid-1920s when only five babies were named Ollive that year. Altogether, there have been twelve little girls named Ollive over these two decades."