Addressing Save the Dates/Invitations

SandraPB1220

I'm wondering how to address a save the date (and later, the invitation) to my grandmother, who is widowed, and my uncle that lives with her that has the same first name as my deceased grandfather.  Technically, it should be Mrs. John Jones and Mr. John Jones, but I think that sounds awkward.  My uncle is not a Jr., so that doesn't help.  Any suggestions?