I'm currently replaying Final Fantasy VII and I wondered if there was a relationship between the whole Final Fantasy Franchise before VII. I have never played any Final Fantasy but VII and XIII now. Is there a relation between Final Fantasy I,II,III,IV,V,VI and VII? And between this ones and VIII,IX,X? XI is online, so I won't bother trying it, same as XIV.
I've looked around some website, but they do not seem to mention anything like a relation between them.
Can anyone help me solve my doubt?