I was reading Elantris, with my passive work being Jorge Luis Borges "Book of Imaginary Beings". The chapters are encyclopedic and short, and are meant to have a kaleidoscope style of reading. With Cosmere on my mind, I can across a really interesting entry:
Sylphs For each of the four roots or elements into which the Greeks divided matter there was a corresponding spirit. In the words of Paracelsus, the sixteenth-century Swiss alchemist and physician, we find four elementary spirits: the Gnomes of the earth, the Nymphs of water, the Salamanders of fire, and the Sylphs or Sylphides of air. The words are Greek origin. Litre has sought the etymology of "sylph" in the Celtic tongues, but it is most unlikely that Paracelsus would have known, or even suspected the existence of, those languages. Today, no one believes in Sylphs, but the phrase "a syphlike figure" is still applied to slender women, as a somewhat cliched compliment. The Sylphs occupy a place between that of material beings and that of immaterial beings. Romantic poetry and the ballet find them useful.
I don't think it is a far stretch or much of projection when I say that reminds me of a certain Spren. Either way, it made my day to come across this while reading.
If you poke around a bit, you can probably find where the names of some other spren (like Notum) come from. In a lot of their names, I'm looking for something similar to what I did with Syl. My rationale is that if you heard her name in-world (which might not actually be the exact sounds Syl) you'd have the benefit of local traditions, word roots, and mythologies. You'd hear it and say, "Huh, that sounds like a word for wind." So, when the books are "translated" to English, the translator creates names in English that evoke the same feel in readers here.