xenagogue
One who guides strangers; a guide or tour guide.
obsolete, rare
[…] I vvill be their Xenagogus, or guide, and firſt ſhevv them our Country of Kent, the inhabitants vvhereof, [Julius] Cæſar himſelf in his Commentaries, confeſſeth to be of all others the moſt full of humanity and gentleneſſe.
Where it comes from
Learned borrowing from Ancient Greek ξεναγωγός (xenagōgós), from ξένος (xénos, “foreigner; guest; stranger”, noun) (possibly ultimately Pre-Greek) + ἀγωγός (agōgós, “(adjective) guiding, leading; (noun) escort, guide”) (from ᾰ̓́γω (ắgō, “to bring along, lead”) (ultimately from Proto-Indo-European *h₂eǵ- (“to drive”)) + -ός (-ós, suffix forming agentive or patientive adjectives and nouns)). By surface analysis, xen- (prefix meaning ‘relating to foreigners or strangers’) + -agogue (suffix denoting something leading to another thing).
Adapted from the Wiktionary entry xenagogue (CC BY-SA 4.0).