Correct grammar for proper names that end in s?
When a proper name ends in "s," you show possession by adding an apostrophe after the "s." For example, "The house belonging to Mrs. Jones." If the name is plural and ends in "s," you can either add an apostrophe after the "s" or just use an apostrophe at the end without adding another "s." For example, "The cars of the Joness" or "The Joness' cars."