Filed from 2 published puzzles

ADRIANI

Set to 2 different clues across 2 published puzzles, most often “Pope during the reign of Charlemagne” — The New York Times, Saturday, 5 July 2008.

7 letters

Every clue on record, most used first

Pope during the reign of Charlemagneonce
The New York Times — Saturday, 5 July 2008
Eighth-century pope in office for 23 yearsonce
The New York Times — Saturday, 19 May 2007