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[–] 4 points 1 month ago (1 child)

It seems that both s’s and s’ could be valid here, according to Merriam Webster

https://www.merriam-webster.com/grammar/what-happens-to-names-when-we-make-them-plural-or-possessive

It’s an ex belonging to one Cyrus.

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  • [–] 1 point 1 month ago*

    No, if you read what you linked it very clearly states words with two syllables usually ends in s = ', one syllable ending in s = 's.

    So it's wrong. Unless you don't consider Cyrus to be a classical name.

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