OK. I'll meet you halfway. From englishforum.com:
If there are two people at a meeting who are called Jones, you could say, "There were two Joneses at the meeting.
However, although the general rule is to add es to the name it becomes somewhat cumbersome with some names. For example, it looks most awkward if you said there were two Culbertsonses at the meeting, or two Edwardses, or two Bateses.
And I would throw the Stevens family in that bunch. (No pun intended--well, actually it was)