Hi,Here are the forms for singular, singular possessive, plural and plural possessive family names.
 
Singular:
Tom Taylor                   Ed Smith                   Jim Jones
 
Singular Possessive:
Tom Taylor �s house      Ed Smith �s house     Jim Jones �s house
 
Plural:
The Taylors                   The Smiths               The Joneses
 
Plural Possessive:
The Taylors � house        The Smiths � house   The Joneses � house
 
Tom Taylor lives in Tom Taylor �s house.
The Taylors live in the Taylors � house.
 
Jim Jones lives in Jim Jones �s house.
The Joneses live in the Joneses � house.
 
I hope this helps you. People try to make it much more complicated, but this is it.
 
Bruce