Man pages matching name djpeg in section 1:

djpeg.1.en	debian 10 / libjpeg-turbo-progs
djpeg.1.pl	debian 10 / manpages-pl
djpeg.1.en	debian 11 / libjpeg-turbo-progs
djpeg.1.en	debian 12 / libjpeg-turbo-progs