@Ant
Removing the objectively false information isn't too difficult. However, if the revisions include the Azathoth vs Yog-Sothoth stuff, then I guess I'll finally weigh in on that, now that I have a little bit of time. I'll
try to keep this relatively short. I apologize if it is rather structureless.
As I said before, a lot in the Mythos is left up to interpretation, and I would not fault anyone for personally viewing Yog as the supreme being (I sometimes like to when taking TtGotSK in a vacuum), but I believe there is some stuff that must be set straight when it comes to making a unifying hierarchy for the Mythos and why most people put Azathoth at the top. It's not like it just started from complete misinformation and was perpetuated only by hearsay.
I have seen some people say that Yog seems more impressive, which I can sort of agree with, but the problem here is that it is based on two vastly different things. Of course the description of Yog (and by extension, the Archetypes) is more "impressive"; it is a major plot point of an entire short story in which Lovecraft spends numerous paragraphs describing the structure of existence and the flawed nature of perspective. Azathoth, by comparison, only appears "in person" within a 14-line poem, as the book he (likely) would have appeared in was scrapped, and possibly recyled into
The Dream-Quest of Unknown Kadath. Obviously Yog-Sothoth's description would be far meatier. This does not nullify the fact that something we are told less about can be deemed superior to something we have greater information on if we are simply told it is so.
It is also worth noting that, even within the confines of that short poem, Azathoth is portrayed as something remarkably important; the source of the fundamental laws of each cosmos. It is not like he is totally featless without WoG, or lacks any sort of grand cosmic importance.
"
Here the vast Lord of All in darkness muttered
Things he had dreamed but could not understand,
While near him shapeless bat-things flopped and fluttered
In idiot vortices that ray-streams fanned.
They danced insanely to the high, thin whining
Of a cracked flute clutched in a monstrous paw,
Whence flow the aimless waves whose chance combining
Gives each frail cosmos its eternal law." - Fungi from Yuggoth, XXII. Azathoth
Speaking of which, multiple times in-universe, he is referred to as some kind of boundless entity who rules over everything. While we know human knowledge of these beings is
incomplete, it may not be entirely wrong. Such knowledge comes from the same source that states Yog-Sothoth to be one with all time and space. Though fractional, the Necronomicon suggests Azathoth to be > Yog-Sothoth, so Lovecraft's choice of Azathoth as the source of all in his "family tree" didn't come from nowhere.
- "There were, in such voyages, incalculable local dangers; as well as that shocking final peril which gibbers unmentionably outside the ordered universe, where no dreams reach; that last amorphous blight of nethermost confusion which blasphemes and bubbles at the centre of all infinity—the boundless daemon-sultan Azathoth, whose name no lips dare speak aloud, and who gnaws hungrily in inconceivable, unlighted chambers beyond time amidst the muffled, maddening beating of vile drums and the thin, monotonous whine of accursed flutes; to which detestable pounding and piping dance slowly, awkwardly, and absurdly the gigantic ultimate gods, the blind, voiceless, tenebrous, mindless Other Gods whose soul and messenger is the crawling chaos Nyarlathotep." - The Dream-Quest of Unknown Kadath
- "There were suggestions of the vague, twilight abysses, and of still vaster, blacker abysses beyond them—abysses in which all fixed suggestions of form were absent. He had been taken there by the bubble-congeries and the little polyhedron which always dogged him; but they, like himself, had changed to wisps of milky, barely luminous mist in this farther void of ultimate blackness. Something else had gone on ahead—a larger wisp which now and then condensed into nameless approximations of form—and he thought that their progress had not been in a straight line, but rather along the alien curves and spirals of some ethereal vortex which obeyed laws unknown to the physics and mathematics of any conceivable cosmos. Eventually there had been a hint of vast, leaping shadows, of a monstrous, half-acoustic pulsing, and of the thin, monotonous piping of an unseen flute—but that was all. Gilman decided he had picked up that last conception from what he had read in the Necronomicon about the mindless entity Azathoth, which rules all time and space from a curiously environed black throne at the centre of Chaos." - The Dreams in the Witch House
- "Gilman wondered, too, whether he could trust his instinct to take him back to the right part of space. How could he be sure he would not land on that green-litten hillside of a far planet, on the tessellated terrace above the city of tentacled monsters somewhere beyond the galaxy, or in the spiral black vortices of that ultimate void of Chaos wherein reigns the mindless daemon-sultan Azathoth?" - The Dreams in the Witch House
- "Before his eyes a kaleidoscopic range of phantasmal images played, all of them dissolving at intervals into the picture of a vast, unplumbed abyss of night wherein whirled suns and worlds of an even profounder blackness. He thought of the ancient legends of Ultimate Chaos, at whose centre sprawls the blind idiot god Azathoth, Lord of All Things, encircled by his flopping horde of mindless and amorphous dancers, and lulled by the thin monotonous piping of a daemoniac flute held in nameless paws." - The Haunter of the Dark
Now, I think it's important to mention that some people wish to ignore the Family Tree. While fine for personal reasons, I don't think this works very well when trying to make a unified Mythos. For starters, it is the only time in canon Yog and Azzy are mentioned together. It is the only direct comparison we have between the two, with a slightly less than direct comparison in the Necronomicon. People have mentioned that it is a joke. Yes, the joke is that Lovecraft's
Welsh ancestor is a descendant of eldritch monstrosities, as is the ancestor of HPL's friend, Clark Ashton Smith. The joke is at the very bottom. There is nothing to support "Azathoth being at the top" as part of the joke, as it is a sentiment that actually goes along with the little we know about it. One could not argue that Lovecraft had not yet finalized his idea of Yog-Sothoth either, as both dates I could find for the family tree letter come from after
Through the Gates of the Silver Key was written.
The OP attempts to use another joke letter about Yog-Sothoth to cast doubt upon the family tree letter, but I think in doing this, missed much of what made the Yog-Sothoth letter a joke. It is an amusing story in which an outer god is compared to a
dog, which can be seen through the comparions made within the letter. Hence part of the reason specifically to use the term "pedigree" when responding to a question on Yog's family. After all, a dog can't really be purebred if it was not
bred. Despite this, the joke letter actually contradicts Yog itself more than it contradicts its relation to Azathoth.
- "Has Yog-Sothoth a pedigree? No. He has always existed."
Correct. This is true of every archetype/other god. Because time and perspective are lies of limited beings. "
Time, the waves went on, is motionless, and without beginning or end. That it has motion, and is the cause of change, is an illusion. Indeed, it is itself really an illusion, for except to the narrow sight of beings in limited dimensions there are no such things as past, present, and future. Men think of time only because of what they call change, yet that too is illusion. All that was, and is, and is to be, exists simultaneously."
- "Since he has no parents, I've never met 'em."
Correct. He does not have parents. Even if Azathoth > Yog-Sothoth on the family tree, Yog does not have "parents".
- "He isn't housebroken, so I generally try to chain him outside. When he sends forth a pseudopodic tentacle (which can pass through the most solid walls) and begins to grope around inside the house, I usually call his attention to something going on in another galaxy——just to get his mind off local things. Yog doesn't always have long, ropy arms, since he assumes a variety of shapes——solid, liquid, and gaseous——at will. Possibly, though, he's fondest of the form which does have 'em. I've never encouraged him to scratch my back, since those whom Yog-Sothoth touches are never seen again...at least, in any recognizable shape."
The rest of this paragraph contradicts absolutely everything about the actual nature of Yog-Sothoth that we know about from the Mythos, making it clear just how much more of a joke this letter is than, say, the family tree. Even if we assume that only the first few sentences are legitimate and the rest are jokes, said sentences can be directly validated in universe without changing Yog's position in relation to Azathoth. I also think it's kind of weird to say that because this letter is jokey and contradictory, and that some letters are jokier and more contradictory than others, we can't trust Lovecraft in his letters
period. It's not that hard to distinguish which part of something is meant to be a clear joke or have no merit, and not every letter Lovecraft ever wrote was as comical as the Yog-Sothoth one.
Despite going on and on about this, I believe that in general, varying views of the Mythos are good. The problem is that we are trying to give these entities a clearly defined tier and position, so we must use what we know. In regards to the relationship between Yog-Sothoth and Azathoth, we know:
1. They never appear together/have any interaction in any of the Mythos stories we consider canon.
2. We are given exponentially more information about Yog-Sothoth.
3. Despite this, Azathoth is repeatedly suggested to be higher by the (albeit fractional) Necronomicon.
4. The single piece of information about their relationship we have from the author himself places Azathoth higher.
With this considered, I believe it is generally safer to consider Azathoth the top being of the Mythos, with Yog an extremely close second. If one wants to create a version of the Mythos with Yog at the top using only what we consider canon, it would genuinely be easier and safer to remove Azathoth entirely than place him somewhere arbitrarily below Yog, despite the limited information we have on him giving him higher standing. I would, of course, prefer the former.