DURANT

Set to 2 different clues across 3 published puzzles, most often "The Story of Civilization" author — The New York Times, Friday, 12 July 2002.

6 letters

Every clue on record, most used first

"The Story of Civilization" author2 times
The New York Times — Friday, 12 July 2002
Historian Willonce
The New York Times — Thursday, 22 December 2005