How would you denote possession in names ending with an s such as Alexis?

Answer 1

To denote a singular (one) possession you would simply add an apostrophe after the "s" and add another "s" (s's). If it were a plural possession you would simply apply an apostrophe after the "s".

Example: Singular Possession

Alexis's stuffed animal was recently burned in the fire that destroyed her house.

Example: Plural Possession

Alexis' animals were safely removed from the house during the fire.

Answer 2

You can denote possession in names ending with an s by adding an apostrophe followed by another s: Alexis's.