So, do you add an s to a family name when you’re addressing the envelope to the family? In case you want to send us a card, it’s “The Beavers,” not “The Beaver’s.” Even though some people add an apostrophe and an s to people's last names to make them plural, it's not correct.
The rule to follow when making a last name plural is add an s, unless it ends in s, x, z, ch, or sh; then add an es. For example, Lopez becomes Lopezes and Harris becomes Harrises.Does the es added to a last name look strange? Spell check doesn’t like it either. But that’s the proper way to do it.