Often this started as speculative real estate developments, so there weren’t any inhabitants. Geographer William Wyckoff wrote a good book about land deals and settlement in western New York State around 1790-1820 – it’s called The Developer’s Frontier.
Easy, tiger. I said “of no great import,” rather than “unimportant.” 
And the Oviedo I live in wasn’t named until 1870, when Oviedo’s days as a global city were quite a while behind it.
I am going to try and get the locals to start calling themselves Ovetenses instead of Oviedoans. I have long since given up on trying to get them to pronounce Oviedo correctly (they say “Oh-veedo” instead of Oveaydo).
It’s not completely clear who named the towns. It might have been Simeon De Witt, the Surveyor General of the State of New York, but most historians believe the actual naming was done by Robert Harpur, his clerk.