here is the best answer from another forum. I have not shown the whole forum you do not need it. Best answer given a green tick and the forum closed by the administrators. BEGIN: There are really just two rules to remember, whether you’re pluralizing a given (first) name or a surname (last name): If the name ends in s, sh, ch, x or z, add es. In every other case, add s. Similarly, there are two fundamental no-no’s: Never change a y to ies when pluralizing a name; and Never, ever use apostrophes! Examples: Incorrect: The Flaherty’s live here. The Flaherties live here. Correct: The Flahertys live here. Sandra’s two favorite boyfriends are Charleses. There are seven Joneses in Stuart’s little black book—three of them Jennifers. The Hopkinses are coming over for dinner tonight. end

See Comments, but in short, they are not the same (and Joness is actually incorrect)

True, however the Greens is a plural. Each and every member of a family. So when pluralizing Jones family we follow normal rules and -es. Like class becomes classes.

the Green family=the Greens

Also.. Joness is incorrect I'm afraid