As far as I know, the names, especially the abbreviated ones you list, are always in English whether or not the surrounding text is in English.
Technical abbreviations like this tend to be universal, ...
To add other possibilities according to Wiktionary (filtering those words that convincingly pass through Ancient Greek):
ferrum: [possible Phoenician and maybe through Etruscan]
genius: [from Proto-...
The adverb you are looking for is desuper (or, much more rarely, desursum).
Here's a close parallel from the Aeneid:
Aetheria tum forte plaga crinitus Apollo
desuper Ausonias acies urbemque uidebat