palfrey (n.)

c. 1200, palefrei (mid-12c. as a surname), "saddle horse for ordinary riding (opposed to a war horse), a fine, small horse for ladies," from Old French palefroi (11c., palefreid) and directly from Medieval Latin palafredus, altered by dissimilation from Late Latin paraveredus "post horse for outlying districts" (6c.), originally "extra horse," from Greek para "beside, secondary" (see para-) + Medieval Latin veredus "post horse; light, fast horse used by couriers," which is probably from Gaulish *voredos, from Celtic *wo-red- (source also of Welsh gorwydd "horse," Old Irish riadaim "I ride"), from PIE root *reidh- "to ride" (see ride (v.)). The Latin word passed to Old High German as pfarifrid, and in modern German it has become the usual word for "horse" (Pferd).