equerry (n.) Look up equerry at Dictionary.com
1590s, short for groom of the equirrie, from esquiry "stables" (1550s), from Middle French escuerie (Modern French écurie), perhaps from Medieval Latin scuria "stable," from Old High German scura "barn;" or from Old French escuier "groom," from Vulgar Latin scutarius "shield-bearer." In either case, spelling influenced by Latin equus "horse," which is unrelated.