If speaking them loud I'm probably swapping the [w]'s with [v]'s. Beyond that one could probably guess my native language and even local dialect from that, specially the vowels.
The "letter swapping" thing is that I mentally read those names as in Latin, with the sound [w], because they clearly look like Latin words. However since plenty people whine against it I read them aloud with the sound [v].
The "guess my native language" part is about the rest, disregarding the [w] vs. [v] thing. (It's Portuguese.)
Vulcanus: Definitely 2, never even crossed my mind on 1. It's like Venus but it's a Vulcan.
Gleba: 2
Fulgora: 1
Aquilo: Well I've been pronouncing it as a-QUILL-ee-oh this whole time, probably due to the motorcycle brand "Aprilia," which looks similar to "Aquilo". I guess I can just drop the 3rd syllable. That makes it option 3 I believe.