While there are no records clearly indicating the reason for the name Orillia, the most common explanation holds that the name originates in the Spanish, "orilla," which can mean the shore of either a lake or river. The Spanish pronunciation sounds much like, "oreeya," and since the word itself is spelled almost identically to Orillia, without the second, "i," it has come to be commonly accepted as the source word for the city's name. Further backing the theory of a Spanish origin are the names of surrounding communities and landmarks, which include Oro for gold, Mariposa for butterfly, and Mono for monkey. Historical documents contain a second spelling of the name which was never officially recognised, Aurelia, which when pronounced sounds similar to the name and is considered a clerical error.Why Call it That? by Ross McDonald, published by the Orillia Historical Society. Page 2
