Today I Learned (TIL)

It's beautiful, isn't it? We look at the past, and it opens a small window to an even earlier past.

It's a bit off-topic but here's another example that I find also fascinating - horses in the Greek myths. What's up with the divine twins Castor and Pollux being always pictured with horses? Or Poseidon, a sea god, creating land animals? Or the association between horses and glory in battle?

Sure, horses are useful, but less so in a rough terrain; and the Greeks weren't exactly mass breeding horses, they were mostly a resource for rich people. Almost like they inherited some myths that only made sense in another environment full of open fields, where horses were a way of life.

And just like the genesis myths talk about what happened from the PoV of the natives, those horse myths talk about the origin of the invaders, as steppe nomads near the Pontic Sea. And then suddenly you find a lot other similar myths, in other Indo-European cultures; such as the Rigveda with the अश्विनः / Aśvinaḥ ("horse possessors", divine twins, who save people from the sea), or Germanic tales about the sea invasion of Britannia being led by Hengist (stallion) and Horsa (horse).

It makes me feel like everything is connected, and perhaps we shouldn't be even talking about "Greek culture", but just that Greek portrait of human culture.

But I digress. (Sorry, I tend to talk a lot about Indo-European culture, it's one of my passions.)

I’ve read people suggest that some of these almost prehistoric names come out of onomatopoeia. What do you think?

Personally I find it possible but unlikely. I think that they get those short, almost "bah!"-like forms due to erosion, caused by sound changes and the borrowing process.

It's simply that we don't know enough about its etymology further back to "see" a well-structured word. All that we see is that "gê", sometimes "da".

Like it’s fascinating that Gaia is a pretty important goddess, but wasn’t really honored and mentioned as much as the dodecatheon and neither was Uranus. Almost like deist entities.

Yup! She's a goddess, but she lacks all the whistles and bells that you'd associate with the Olympians, because she's more like a divine aspect of nature. By worshipping her you aren't just worshipping some abstract entity in the middle of nowhere, you're worshipping the very soil that gives you sustenance.

It's interesting that you mentioned Ouranos, as it's another god with a rather transparent name: οὐρανός/ouranós is the sky vault, where the stars are attached to. Your association is spot on - he's also a divine aspect of nature, a step further from humankind than the Olympians.