Plurals of Proper Names?
“Here are a few rules that will help the curious pluralize proper names. Please note that, in every case, the spellings of the proper names should not change except for the addition of -s or -es. “With proper names ending in a sound that blends well with s, simply add -s. Brown = the Browns Lindberg = the Lindbergs Ericson = the Ericsons Shaw = the Shaws Hogan = the Hogans Whitlock = the Whitlocks “With proper nouns ending in sounds that don’t blend well with s, the sibilant sounds, add -es. Cox = the Coxes Jones = the Joneses Douglas = the Douglases Martinez = the Martinezes Firch = the Firches Nemetz = the Nemetzes” (Strumpf and Douglas, The Grammar Bible 15-16).