Who knows if there had been communal connections among them with probabilities to had have clue of each other as they may share same vision in the cryptography on Bitcoin and with his(Theymos) profile and influence in the platform being created by Satoshi himself?
Theymos didn't founded this forum it's sirius and sastoshi who did it , and they communicate with crypto graphy mail . You can find out the cryptography mail archive. Also satoshi used anonymous email for it.
I created a topic about these matters , some og members shared their thoughts you can watch my post I pointed some information there.
Some FAQ you might find interested and add your question