In the excellent Netflix series Dark, the Unknown. aka the Origin, is the son of one timeline’s version of Jonas Kahnwald with the alternate Universe’s Martha Nielsen. He is the proximate cause of the Winden apocalypse.
Now I’m seeing multiple sources say that the Unknown is the ex-husband of Agnes Nielsen and the father of Tronte Nielsen. This would make Jonas his own great-great-great-grandfather, and would make Martha her own great-great-grandmother. And in terms of incest it would make Jonas the great-great-grandfather of his lover Martha, would make Hannah the great-great-great-grandmother of her husband Mikkel/Michael, and would make Katharina the great-great-grandmother of her husband Ulrich.
And indeed, the family tree engraved in Eve’s headquarters depicts the Unknown (denoted by the infinity sign) as the husband of both Agnes Nielsens and the father of both Tronte Nielsens in the two Universes, which is probably what it means to say that he’s the link between the Universes:
But my question is, apart from this family tree, is it ever explicitly confirmed in dialogue or some other way that the Unknown really is Agnes Nielsen’s ex-husband and Tronte’s father? Or is the viewer just expected to read between the lines, like the fact that Agnes’ ex-husband was a priest, the Unknown’s line to Doris that he used to be a priest, and the Unknown’s line to Tronte that he gave him his name?