'Képi' is a word borrowed from German (Swiss) 'Käppi'. The word entered the English language some time around 1861.
képi [noun] [1861]
See 'képi' on the Loan Words Map
See more loan words from German (Swiss).
Etymology: French 'képi' from German dialect (Switzerland) 'käppi' cap
See more loan words from 1800s.