DARWIN

Set to 4 different clues across 4 published puzzles, most often "The Voyage of the Beagle" writer — The New York Times, Thursday, 6 August 1998.

6 letters

Every clue on record, most used first

"The Voyage of the Beagle" writeronce
The New York Times — Thursday, 6 August 1998
Writer aboard the Beagleonce
The New York Times — Friday, 14 March 1997
Evolution theorist Charlesonce
The New York Times — Monday, 5 August 1996
Noted naturalistonce
The New York Times — Sunday, 29 January 1995