Comrade
mid 16th century (originally also camerade ): from French camerade, camarade (originally feminine), from Spanish camarada ‘room-mate’, from Latin camera ‘chamber’. Compare with chum1.
wiktionary
From late Middle English comered, from Middle French camarade, from Spanish camarada or Italian camerata, from Medieval Latin *camarata, from Latin camara, camera(“a chamber”); see chamber. Compare camaraderie.
etymonline
comrade (n.)
1590s, "one who shares the same room," hence "a close companion," from French camarade (16c.), from Spanish camarada "chamber mate," or Italian camerata "a partner," from Latin camera "vaulted room, chamber" (see camera). In Spanish, a collective noun referring to one's company. In 17c., sometimes jocularly misspelled comrogue. Used from 1884 by socialists and communists as a prefix to a surname to avoid "Mister" and other such titles. Related: Comradely; comradeship.
