equerry

An equerry (; from French écurie 'stable', and related to écuyer 'squire') is an officer of honour. Historically, it was a senior attendant with responsibilities for the horses of a person of rank. In contemporary use, it is a personal attendant, usually upon a sovereign, a member of a royal family, or a national representative. The role is equivalent to an aide-de-camp, but the term is prevalent only among some members of the Commonwealth of Nations.