scene.addObject return a game object, you can save it in a property and use it later intead of using scene.objects, you can use it also to change its name.
myObj = scene.addObject("myObjName") #Add the object and store it temporally.
myObj.name = "Something" #Make what you want with the added object
owner["someVariable"] = myObj #You can access to the object later using this property, you can also store it in the first line