[name]Rory[/name] is a stand alone name, it’s a phonetic spelling of an Irish Gaelic name,so I wouldn’t worry about it being a nickname.It is more of a boys name however(well,this side of the Atlantic anyway).
Names like [name]Aurora[/name] are so pretty, it seems a waste of time to name your daughter such a name and then nickname her [name]Rory[/name]. [name]Both[/name] good names in their own right in my opinion.