none but(literary) onlyNone but he knew the truth.
none other than
used to emphasize who or what somebody/something is, when this is surprisingHer first customer was none other than Mrs Obama.
have/want none of something
to refuse to accept somethingI offered to pay but he was having none of it.
Usage note: none ofWhen you use none of with an uncountable noun, the verb is in the singular:None of the work was done.When you use none of with a plural noun or pronoun, or a singular noun referring to a group of people or things, you can use either a singular or a plural verb. The singular form is used in a formal style in British English:None of the trains is/are going to London. ◇ None of her family has/have been to college.