You should ignore the Endtimes and Age of sigmar lore because according to that there are no real gods except the chaos gods. All the order gods are just surviving champions from a previous world destroyed by chaos which is just stupid and does not add up with the original lore. Endtimes should simply not be considered cannon because it has waaay too many plot holes and was really just written to try to bridge old Warhammer fantasy with the new Age of sigmar. We can be pretty certain that there is a dwarven realm of the dead just like every other faction has one. If you want to better understand the ancestor gods you really don't have to look further than Grombrindal who has the ability to step in and out of our realm at will and deliver his burning grudges. It is literally Norse mythology, the honourable warriors gets to live forever in "paradise" and potentially ascend to godhood while the others go straight the the realm of the dead which we haven't heard much about from the dwarf perspective but we can be fairly certain that there is one as every faction does. It's not really that much of a stretch as dwarf champions are capable to becoming demi-god like characters just by fighting and enchanting their items with magical runes. It is also worth noting that the dwarfs has a special bond with the warhammer world that no other faction does, not even the lizardmen. They are tied to the mountains, they are basically the mountains given living form. This is why dwarfs are so stubborn and resistant to magic (or vulnerable, depends on how you want to look at it, as they literally turn to stone if they try to cast spells). A little sidenote is that unlike 40k magic does not come from the realm of chaos, the winds of magic existed before anything else. The realm of chaos was created by the overwehalming amounts of winds of magic that used to exist before the great vortex. The vortex sucks out winds of magic weakening the demons created within the realm of chaos to the point that they can no longer survive in our realm. In their realm however the winds of magic still flow strongly. Which is why characters like teclis and malekith can enter the chaos realm and survive because it literally boosts their power exponentially.
Weirdly enough in real life their are marriages of two brothers to a woman if land is hard to work. Not sure were it's done but I believe it's in the moutains
