Sorry how do you get that 1800s figure? The spell went 9 levels up the family tree, to our nazi's seven times great grandsire, and then all their children and all their children and so forth. Even just with mortal life spans you get to the 1800s easily with that number.
Add a few vampires who were turned for forty or fifty years before they turned the vampire that was a direct descendent, maybe a single outlier who turned the great-five times grandsire when he was two or three hundred... And now you're looking at vampires all the way back to the 1600s or earlier.
Capping it at the early 1800s suggests that there wasn't a single vampire in his line who was more than 25 or so (and that's actual age, not 25 years as a vampire) when they sired our nazi and his vampiric ancestors. While that seems reasonable for a first or maybe second 'child', an entire family tree of nothing but eldest children seems wildly unlikely. There wasn't a great grandsire somewhere who was the seventh child of their sire, turned when the sire was 90? A few turnings by 50-60 year old vampires?
Our patient zero for the spell was well into his 90s and still making new vampires if he was a grown adult in the 1940s
Totally agree! Ironically enough with how vampires work with the spreading of there curse, I can actually see a scenario where he wiped out ALL or at the very least most, vampires on earth.
Woo, alright boys and girls, we got ourselves a numbers game! Do any of you like statistics?
Because I sure do!
Starting off, let's try and determine how often a vampire typically sires another one!
...Well, actually we don't have that information. Not in canon. And the myths vary wildly from source to source.
Let's just say that the average vampire sires one new vampire a year.
So, patient zero. He gets hungry and he sires a new vampire. And, for the sake of brevity, let's assume that v1 doesn't sire a new vampire in the same year he's raised.
The family tree is pretty simple right now. v0(1) -> V1(1) What about next year? v0(1) -> v1(2) -> v2(1) Well, we've gotten our numbers a good bit higher than when we started. An average person is now four times as likely to get bitten but they only have a 25% chance of it being from generation zero!
Well, that doesn't look -too- bad! How about year three? v0(1) -> v1(3) -> v2(3) -> v3(1) hmm... getting a little uncomfortable living in that village, eh?
4 -> v0(1) -> v1(4) -> v2(6) -> v3(4) -> v4(1) = 16
5 -> v0(1) -> v1(5) -> v2(10) -> v3(10) -> v4(5) -> v5(1) = 32
6 -> v0(1) -> v1(6) -> v2(15) -> v3(20) -> v4(15) -> v5(6) -> v6(1) = 64
7 -> v0(1) -> v1(7) -> v2(21) -> v3(35) -> v4(35) -> v5(21) -> v6(7) -> v7(1) = 128
8 -> v0(1) -> v1(8) -> v2(28) -> v3(56) -> v4(70) -> v5(51) -> v6(28) -> v7(8) -> v8(1) = 256
9 -> v0(1) -> v1(9) -> v2(36) -> v3(84) -> v4(126) -> v5(121) -> v6(79) -> v7(36) -> v8(9) -> v9(1) = 512
Now, I could go on and on, start tossing in variables and try to come up with some fluid formula that might factor in losses along the line but that's really not the point.
The point is that, while there is a risk of being bitten by a cro-magnon vampire, the odds of it happening get worse and worse every year. Eventually, while Dracula or Kain might still be hanging around, the likelihood of actually getting bitten by them and not one of their many-times removed grandchildren is, honestly, downright negligible.