"armor for the throat," late 15c., from Old French gorgete "throat, necklace," diminutive of gorge "throat" (see gorge (n.)).
Entries linking to gorget
gorge n.
mid-14c., "throat," from Old French gorge "throat; a narrow passage" (12c.), from Late Latin gurges "gullet, throat, jaws," also "gulf, whirlpool," which probably is related to Latin gurgulio "gullet, windpipe," from a reduplicated form of PIE root *gwora- "food, devouring." Transferred sense of "deep, narrow valley" was in Old French. From 1520s as "what has been swallowed," hence in figurative phrases indicating nauseating disgust.