Query on parents of Mary CURRAN

I cannot provide any sources for Mary being the daughter of John and Maria (or Merle) Leanne.

Also I cannot find any sources which have Mary's middle name as Olive. I can see though how this has mistakenly come about because when looking at the baptismal documents of some of the children, there is the Latin word Olim, meaning formerly. So her name reads Mary Olim Curran Heffernan. In the cursive hadnwriting of the records it looks a bit like "Olive".