@zephyroths well, look at something like the catholic religion. it has ties to serveral other religions like judism, islam, christianity, ect. But it's origins only go back around 2000 years of recorded history, everything before that is stories and such. So how did all these different religions split up and get different names for their gods and practices. 2000 years is a lot of time for people to forget shit and split off or change details. More so if things like books or records are rare/expensive or have been destroyed at one point. All kinds of things can get changed, and then 2000 years later one religion turns into several. So in this case a name gets changed or lost to time.