Where did Victor/Louis come from? Speculation welcome
I loved the second season and was satisfied about most of the answers they gave. However, we never find out Victor/Louis' (I'll call him Victor from now on) origin story.
Spoilers for those who haven't seen the last two episodes of season 2, if I get a fact wrong, please correct me:
In the finale, 36 years ago we see Lucy show up at Milan's bar, telling him she's waiting for a child. That child is Victor. The earliest we see him in the timeline is when he shows up at Etienne's house to warn him about the dam, while young Berg watches their interaction. He's shooed away by Etienne and goes to the Lewanski's house, knocks on the door and makes himself comfy at the dinner table after Mrs. Lewanski opens the door. He subsequently dies during the house invasion that Pierre took part in.
I feel like I'm missing something, but where did Victor come from originally? Are we supposed to think he's always been around as a "revenant"?
Any ideas would be most welcomed. I love this show, this is the one big question I have.