I know it's been mentioned elsewhere - but I wanted to create a thread devoted to solely to this issue. The idea of there being 'Half-Dwarven' folk in Arda. I wanted to go over the theory of it regarding Tolkien's original work and in Peter Jackson's Middle-Earth as well.
First off I'll consider the significant 'other half...
Dwarves & Elves - No. Just no in regards to Tolkien's original work and to my own feelings on it, I just don't think this has or ever would happen. Even if there was (by some miracle) a Dwarf/Elf couple I don't think they would be capable of producing offspring that combines both Dwarven and Elven heritage.
As for Peter Jackson... this Kíli/Elf thing can't be serious. Hopefully.
Dwarves & Hobbits - Am I the only one who finds such suggestions a bit... off-putting? To me Hobbits look like children, undoubtedly they're not and they marry and have children of their own together. Fine. But it seems a bit off (to me) for a Dwarf or Man to take a Hobbit-lass for a wife, as she'd be habitually mistaken for a child...
Dwarves & Men - This seems more likely to me - that there has been some mingling between these races at some point. The only possible hint or suggestion I found of it in Tolkien's work was this;
The new host that we had tidings of has come first, from over the River by way of Andros, it is said. They are strong: battalions of Orcs of the Eye, and countless companies of Men of a new sort that we have not met before. Not tall, but broad and grim, bearded like dwarves, wielding great axes. Out of some savage land in the wide East they come, we deem.
Perhaps Men of a 'new sort' are derived from a Dwarf/Man couple... unlikely to be a Dwarf from Durin's Folk that we know most about from Tolkien's work - nor the Firebeards or Broadbeams who were originally from Nogrod and Belegost, but perhaps one from one of the others than awoke in the Orocani, in the East, like the Blacklocks/Stonefoots perhaps?
So - from the above quote I think that there being Half-Dwarven folk is possible (to some this isn't proof enough I imagine), from within Tolkien's work. The fact that they don't play a significant role in Middle-Earth doesn't surprise me - and it doesn't go against what I've gathered from the Sil, when Eru spoke of them. They're not Elves, and unlike the Half-Elven, they don't have great roles to play and so therefore don't feature at all in the books.
... though if we go by this quote, it would be that there aren't Half-Dwarven folk known anywhere in Gondor or beyond further West. That would suggest that the Dwarves of say, Durin's folk - the Firebeards and Broadbeams of the Blue Mountains don't breed with Men, or at least - they haven't known to have done so by Men in the South.
This raises some more questions for me, such as;
- How do/would Durin's Folk regard Half-Dwarven folk?
- How would Thorin Oakenshield regard them? Or say any other member of his Company?
- Would they (Dwarves) accept them (Half-Dwarves) into their own society?
- Would Half-Dwarven women be more accepted than men?
- And what becomes of these Half-Dwarven folk when they die? Are the counted alongside Dwarves or Men? Do they have a choice?
All in all, I think it would be a pleasing concept - for there to be Half-Dwarven folk. That the blood of Dwarves will, like that of the Elves, carry on in the Race of Men - so they won't be entirely gone from Middle-Earth even after the inevitable end of their people comes.