Only one U.S. state has one syllable — Maine. It's also the only state to border only one other state — New Hampshire. No one is really sure where Maine's name came from. Some surmise that it was named after an ancient French province — the Province of Maine; others believe it was a derivation of the world "mainland." The word "Maine" was first officially used in 1665 in a request by the King's Commissioners that "The Province of Maine" be used in official documents.
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"No one is really sure where Maine's name came from. "
If you visit the Maine State Archives, you'll see maps from the late 17th century that labels the land "Main Land".