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To pluralize most family names, we add a simple s:
To pluralize family names that end in ch, s, sh, x and z, we add an es in most cases:
Of course, every exception has its exceptions! When a family name ends in an s that sounds like a hard z (like the s in buys), in most cases its spelling remains unchanged in the plural. In other words, we don’t add an es to make it plural:
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