"Better Call ___" ("Breaking Bad" prequel) (4)

I believe the answer is:

saul

(Other definitions for saul that I've seen before include "King David's predecessor" , "Predecessor of King David" , "St Paul's name when he started on the road to Damascus" , "Oratorio by Handel" , "Old King" .)

I've seen this clue in The New York Times.

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