I searched and searched, can't find ANYthing on this topic (Except that maybe the Winter Queens were also known as The Morrigan, but maybe I found out what it's made out of...
This is interesting. On further reading on the Morrigan, it seems that she was the consort to the Dagda, and she indeed translates quite perfectly into the Winter Queen thing. Depending on the source, it also seems that Morgan Le Fay might have been her human aspect. Considering the relationship between the Dagda/Morrigan and Merlin/Morgan, there might be some credence to the "Odin is Merlin" theory. In the same book we find Vaderung is Odin is Kringle who has Time Powers, and we also see that Merlin is very powerful and has Time Powers AND the mental acuity to work in multiple dimensions- I'd say there's a correlation.
I personally like the idea that the original Merlin was just a crafty bad-ass wizard. I feel that Odin is Santa is Merlin is taking it one step too far, but I of course trust Jim could make it work and be believable and interesting.
I guess it really depends on which stories Jim draws from. It looks like Morgan Le Fey was originally a supernatural being, and later was reported to be Arthur's half sister. Merlin was supposed to have a demon as his father, I like the idea that Odin is Merlin's Sire better than the two being the same person.
I've seen similar theories before, and I think they are possible, but they aren't tied to the 1065 AD timeframe very well. I think they are the best tiein we have thus far but these WoJ's about the blackstaff make me think they are going in the wrong direction:
Some might read this differently, but I read this as saying the staff isn't doing the killing, Eb is, and the staff is just helping him keep sane and uncorrputed by the darkness of the magic. Which doesn't quite fit with the legends of Dagda's club (which is what I think the askers here were tiptoeing around asking about to avoid an "I'm not gonna tell you" sing song)
The more I'm looking into it the more things seem to mesh up. Jim specifically mentions Celtic legend and the Dagda story jibs with Arthurian legend and Dresdenology. The thing is that we don't have to go 100% on the real world lore because it all goes through the Jim filter. Lore is a bunch of half-truths anyway.
I am totally open to hearing your thoughts on the matter if you have another line of thought for me to investigate.
I'm just not mentally tying the Blackstaff too tightly to the 1065 AD time frame. That might have been when a change of hands occurred or something.
I immediately could only find a few historically important things of note (thing that I can relate directly to DF) that happened in 1060s Europe:
1063: The River Thames is frozen for 14 weeks. (Obviously something Wintery happened)
1066:
King of England dies, and New King (Harold) gets chosen by a council of old men.
Battle of Hastings, King Harold and all his brothers are killed and England gets taken over.
Dark Ages ends, Middle Ages begin.
End of the Viking Age in England.
We have a little bit to work with there in terms of guessing at the powers and meaning behind those events, but as far as lore and mythology goes I'm at a total lose as to were else I should be looking.