hostler (n.)

formerly also hosteler, late 14c., "one who tends to horses at an inn," also, occasionally, "innkeeper," from Anglo-French hostiler, Old French ostelier, hostelier "innkeeper; steward in a monastery" (12c., Modern French hôtelier), from Medieval Latin hostilarius "the monk who entertains guests at a monastery," from hospitale "inn" (see hospital). Compare ostler.