Hades “shows up” in 800 BCE right at the Beginning of Homer and The Kingdom of Rome. Highly Suspicious as all things that begin around 800 BCE are.
One Source on Reddit directed me to Poseidon who was called “Husband of Earth,” which would mean “Husband of Gaia.”
Demeter and Gaia are the same in many sources. Furthermore, Demeter bore Persephone and Plutus.
If this is the case, you can see where the Lies branched off.
Here is the Source for the Quote below.
Linear B (Mycenean Greek) inscriptions
If surviving Linear B clay tablets can be trusted, the names po-se-da-wo-ne and Po-se-da-o (“Poseidon”)[14] occur with greater frequency than does di-u-ja (“Zeus”). A feminine variant, po-se-de-ia, is also found, indicating a lost consort goddess, in effect the precursor of Amphitrite.[original research?]
Poseidon was the chief god at Pylos. The title wa-na-ka appears in the inscriptions. Poseidon was identified with wanax from the Homeric era to classical Greece. (anax). The title didn’t mean only king, but also protector. Wanax had chthonic aspects, and he was closely associated with Poseidon, who had the title “Lord of the Underworld”. The chthonic nature of Poseidon is also indicated by his title E-ne-si-da-o-ne (Earth-shaker) in Mycenean Knossos and Pylos. Through Homer the epithet was also used in classical Greece. (ennosigaios, ennosidas).[24]
Po-tini-ja (potnia: lady or mistress) was the chief goddess at Pylos and she was closely associated with Poseidon. She was the Mycenean goddess of nature and Poseidon—Wanax is one from the gods who may be considered her “male paredros”. The earth shaker received offerings in the cave of the goddess of childbirth Eileithyia at Amnisos in Crete. Poseidon is allied with Potnia and the divine child.[25]
Wa-na-ssa (anassa:queen or lady) appears in the inscriptions usually in plural. (Wa-na-ssoi). The dual number is common in Indoeuropean grammar (usually for chthonic deities like the Erinyes) and the duality was used for Demeter and Persephone in classical Greece (the double named goddesses).[26][27] Potnia and wanassa refer to identical deities or two aspects of the same deity.[24]
E-ri-nu (Erinys) is attested in the inscriptions.[28] In some ancient cults Erinys is related to Poseidon and her name is an epithet of Demeter.[29]
It is possible that Demeter appears as Da-ma-te in a Linear B inscription (PN EN 609), however the interpretation is still under dispute.[30][31] Si-to Po-tini-ja is probably related with Demeter as goddess of grain.[32]
Tablets from Pylos record sacrificial goods destined for “the Two ladies and the Lord” (or “to the Two Queens and the King”: wa-na-soi, wa-na-ka-te). Wa-na-ssoi may be related with Demeter and Persephone, or their precursors, goddesses who were not associated with Poseidon in later periods.[33][27]