Sarkisian, for Cher, once, 7 letters
A family shares it, agreeing about subject of a Keats ode (7), 7 letters
Bush or Dukakis, e.g., 7 letters
Ciccone, for Madonna, 7 letters
Dallas, Houston, or Austin, e.g., 7 letters
For Americans, it's always last, 7 letters
It's all in the family, 7 letters
Smith or Jones, e.g., 7 letters
Smith, Jones or Brown, 7 letters
Washington, Roosevelt or Clinton, 7 letters
Known as Smith or Jones, perhaps, 8 letters
Hemingway and Tolstoy, 8 letters
Abbott and Costello, for two, 8 letters
Currier and Ives, e.g., 8 letters
London and Berlin, e.g., 8 letters
Smith and Jones, e.g., 8 letters
The first things many people inherit from their fathers, 8 letters