Crossword Genius

President whose nickname originated in childhood (3)

Ross

I believe the answer is:

ike

(Other definitions for ike that I've seen before include "President Eisenhower" , "Former US President (informally)" , "Dwight D. Eisenhower, in short" , "US general who became president, in short" , "President Eisenhower's nickname" .)

I've seen this clue in the LA Times.
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