I had multple subscriptions years ago thats passed through many hands. I had the subscriptions for at least a year. They were not all registered to me originally.
Is there a way for me to find the usernames and passwords, if all of the billing information was in my name?
I know Sony doesnt like that, but I did pay for those accounts for a long time.
Did any of you ever do this? Will Sony help me?

If billing info is in your name, and the accounts are still active, I'm sure they could cancel billing for you. Beyond that, it's doubtful whether or not they'd reset the password for you, since they don't officially allow account sharing.

There is a "forgot password" link somewhere, which will email a new password to the email address associated with the account. Check out the following link for that.

https://account.station.sony.com/