Hi OP. Your posts here have been approved, but they're more etymology questions than history per se, particularly this one. If you don't get answers here, consider cross-posting to /r/etymology. A few other resources you might try are: Wikipedia, which often includes a short statement or section on the etymology of place names; any good dictionary (most of which include at least some etymological information, a great example being a large Oxford); or a specialist dictionary of etymology, a convenient example being www.etymonline.com.

Also, a reminder to potential respondents: note that this subreddit's rules are in effect in this thread like any other (https://www.reddit.com/r/AskHistorians/wiki/rules#wiki_answers), so please answer in depth rather than simply drop quotes or links. Thank you!