Rules for Plural and Possessive Names | Merriam-Webster
https://www.merriam-webster.com/grammar/what-happens-to-names-when-we-make-them-plural-or-possessive
WebWhat to Know. Names are proper nouns, which become plurals the same way that other nouns do: add the letter -s for most names (“the Johnsons,” “the Websters”) or add -es if the name ends in s or z (“the Joneses,” “the Martinezes”). To show possession using an apostrophe, add ’s for individuals (“Smith’s car”) and just ...
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