Words ending in -x and -z follow the same rules.

Names with s on the end apostrophe. But what if the name is Sanchez or Church or Williams. This rule is just as correct as the older traditional rule of basing on pronunciation which is s. Another accepted way to form the possessive of a name ending in s is to treat it like any other name.

To show the plural of a name that ends with a ch s or z sound add es. Professional copywriter Kim Siever explains how to use an apostrophe after a name ending with Shttpwwwhotpeppercablog20170301use-apostrophe-name-e. However if the singular noun ends in s as in your example Everson you can either just add an apostrophe or apostrophe s s.

Williams Williamss Descartes Descartess Russ Russs etc. Apostrophes with Words Ending in s While normal people wonder about apostrophes in general believe it or not word nerds have heated arguments over whether to use an additional s with singular possession. One of the most confusing punctuation rules is when to use an apostrophe to make a name possessive if it ends in S.

Take a popular name that ends with an s like Charles When were in school a lot of us were told to always add an apostrophe s s to show something that was yours. Take James for example. All of these nouns class princess and boss end in S but they are singular nouns so we just add the apostrophe S at the end.

Felix s car Felix car. Singular common nouns ending in s are made possessive by adding an apostrophe and an s. Proper nouns ending in s are made possessive by adding an apostrophe only.

Charles s dog Charles dog. Many common nouns end in the letter s lens cactus bus etc. For good examples check this out.