An
aide-de-camp is a title in the
peerage system (which infers the
post-nominal letters[?] ADC) which means that the so-honoured person is considered a personal assistant to the monarch of the particular country he or she is a subject of; the first
aide-de-camp is the foremost personal aide. For example,
Prince Andrew, Duke of York of the
British Royal Family is currently the
aide-de-camp to his mother, Queen
Elizabeth II. Simiarly,
Geraud Duroc was made an
aide-de-camp to
Napoleon in
1796, and first
aide-de-camp in
1798.