Harald Tveit Alvestrand -- back to the original question:
I've done a couple of things, depending on how the sources are working. Beli Mawr, the Welsh Sun God, has a pretty clear lineage, so he has one tree, with his various relations, detached and isolated, all master profiles, and labelled either mythological or fictional, I forget which, and the main text added to the suffix -- in this case the Mabinogion.
On the other hand, King Arthur has LOTS of different stories, with different genealogies, so in that case, I created several different King Arthurs, with their various texts -- Early Welsh, Vulgate, Malory, and the like -- showing where that version of Arthur comes from, each tree detached, isolated, all master profiles labelled fictional.
Now, as with the Nordic texts, there are places where the real Welsh tree composed of humans connects to the fictional Arthurian tree composed of fictional people (if there was a King Arthur, we do know know to whom he was connected). So, in that case, I disconnected the Arthurian line from the Tree of Humans, and in the profile of the human fictionally connected to the Arthurian tree, put in notes and links to the detached tree.
Same thing in the Irish -- the reliably human tree morphs into a not so verifiable tree full of magic people -- detached, isolated, labeled fictional, notes and links added.
So that way the mythological ancestors (whom our earlier ancestors believed were their ancestors) are on Geni, but not connected to current humans. And the information about the early medieval genealogies and legends kept.
for what it's worth.
