MERTZ

Set to 8 different clues across 8 published puzzles, most often “Old sitcom couple's surname” — The New York Times, Friday, 11 July 2008.

5 letters

Every clue on record, most used first

Old sitcom couple's surnameonce
The New York Times — Friday, 11 July 2008
1950s sitcom family nameonce
The New York Times — Friday, 13 June 2008
Ricardo landlordonce
The New York Times — Thursday, 7 April 2005
Sitcom landlordonce
The New York Times — Friday, 6 December 2002
Onetime TV landlordonce
The New York Times — Sunday, 17 February 2002
Fred or Ethel of "I Love Lucy"once
The New York Times — Wednesday, 16 January 2002
Ricardo's landlordonce
The New York Times — Wednesday, 30 May 2001
"I Love Lucy" nameonce
The New York Times — Thursday, 20 June 1996