I’m not sure of the reason, but I have seen this word far too much lately.
noone
This is not a word. At least, not a proper word. Please, please do not use this non-word.
anybody ≈ anyone
everybody ≈ everyone
nobody ≠ noone
nobody ≈ no one
somebody ≈ someone
Modified Editing Services 
An old form of noon, I believe, and a surname.
Yes. But never ok in place of “nobody”.
hmm this is interesting. You’re not using the typical errors one sees. The most often mis-used is the apostophie (ok so I can ‘t spell)
Actually, funny you should mention that. I have a detailed post from long ago that covers the apostrophe. Check it out and thanks for stopping by! I hope to see you again.
https://modifiededitingservices.com/2011/11/09/simple-grammatical-rule-apostrophes/