Then what about Venat? She is sundered, right? Because we've always been told about the "3 Unsundered", Lahabrea, Elidibus and Emet-Selch. There was never talk that there might be other Unsundered.
So if Venat is sundered, then it stands to reason that her soul shards have been reborn as people on the Source and its reflections, right? So who are they?
Oh and since you mentioned Hythlodaeus not recognising Zenos's soul, do you have any ideas/theories whose soul Zenos inherited?