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English word janitor comes from Latin ianua, and later Latin ianitor ((anatomy) pylorus. Doorkeeper, doorman, porter.)
ianua (Latin)
Any double-doored entrance (e.g. a domestic door or a gate to a temple or city).
ianitor (Latin)
(anatomy) pylorus. Doorkeeper, doorman, porter.
janitor (English)
(Scotland) A caretaker or custodian; someone who maintains a school building specifically and may serve other administrative roles.. (chiefly, US) Someone who looks after the maintenance and cleaning of a public building.. A doorman.