1. British Columbia? The original folks from the region....Squamish tribal folks....gave the name K'emk'emeláy̓ which happens to mean "place of many maple trees".
K'emk'emeláy̓ would likely be used.
2. Alberta likely stays Alberta.
3. Saskatchewan would likely change....the Cree tribe used the name originally of “Kisiskatchewanisipi”.
4. Manitoba? It would revert to a Cree tribal name of 'Manitou'.
5. Ontario? Skanadario....meaning sparkling waters....to the regional Indians.
6. Quebec? It stays Quebec....that was the original Indian word.
7. New Brunswick? The Indians didn't really have a name for the area, but when the first folks arrived in 1690.....they got to calling it Prigmore's Swamp....after a local guy who lived in the region.
Personally, I like Prigmore Swamp.
8. Novo Scotia? Well....the Indians used “Mi'kma'ki”, and the French called it “Acadia”. Either name would work.
9. Newfoundland? The Inuttitut/Inuktitut name was Ikkarumikluak, meaning "place of many shoals". Would work fine.
10. Prince Edward Island? Local Indians called Prince Edward Island “Abegweit”, which means “cradled in the waves”.
I should also note that as French settlers came in....they called it “Île St-Jean”. Isle of Saint Jean.....would be a nifty state name.
Am I going too far? No.
I'd make this a regional vote process.....put down two or three name options, and just let people pick their choice.