How do you make the last name JONES show possession?

To show possession with the last name "Jones," you would typically add an apostrophe and an "s" at the end, resulting in "Jones's." For example, you would say "Jones's book" to indicate that the book belongs to someone with the last name Jones. If you're referring to a plural possessive, such as multiple people with that last name, you would add just an apostrophe after the "s," making it "Jones'."