Now, supposedly the Kislev pantheon are all siblings, and they used to be a lot more numerous. The only known example of a large number of siblings Gods is the Ellinilli, which were mostly killed off, just like the family of the Kislev pantheon. The domains of the Kislev pantheon could fit being disasters: Tor is lightning, Dazh is fire and/or drought, Ursun is getting eaten by bears and the Ancient Widow is winter/cold/old age? They might be like Mathlann, a God of drowning and shipwrecks that got rehabiltated as a God of sailing in general (but also drowning and shipwrecks), and this fits with the idea in Kislev that their Gods are kind of harsh. The Widow mentioned Ranald being asked by Salyak, which all but confirms that Salyak is Shallya which was already very likely. Ranald and Shallya bear some similarity to Loec and Isha, and their mention in this context seems to indicate that they are one and the same. Now, I personally am not 100% sure that Ranald=Loec and Shallya=Isha, I think they might be related by not quite identical. But in any case the story of the Kislev pantheon does seem very very similar to that of the Ellinilli.