Origin of "no." abbreviation in meaning of "number"? [duplicate]

Question

I Russian speaker and we have № sign for American #.

But I surprised that there are uses of No. abbreviation as shortened form of number.

What the origin of "no." abbreviation in meaning of "number"?

Because it must be nu or num... Is that come from Latin?

Answer 1

The "no." abbreviation of number is Latin in origin, a short form of numero. See http://latin-phrases.co.uk/abbreviations/ for other examples of Latin abbreviations.