For me, the problem with “Rocinante” is I don’t know how to pronounce it.

If you're using a European language, you're pronouncing it correctly, or close enough.

If your only contact with English is the written word, I guess it depends on what languages you're familiar with. If you're using AI / translation software, just ask it to read it to you. Maybe it'll get it right. Or not. Who can tell with those things.