"Blend of Leslie and Ann"
The name Leslieann is commonly a female name from the "English" origin.
Leslieann is a compound given name formed by joining Leslie and Ann, written as one word without a space or hyphen. Leslie is a Scottish surname taken from a place name in Aberdeenshire, and it has been used as a given name in the English-speaking world since the nineteenth century. Ann is the English form of Hannah and has been a common given name in English since the medieval period. Combining two established names in this way is a familiar pattern in American naming.
The pronunciation of Leslieann is LEZ-lee-an.