In the Middle Ages, a familiaris (plural familiares), more formally a familiaris regis ("familiar of the king") or familiaris curiae[1] ("of the court"), was, in the words of the historian W. L. Warren, "an intimate, a familiar resident or visitor in the [royal] household, a member of the familia, that wider family which embraces servants, confidents, and close associates."[2] Warren adds that the term "defies adequate translation", but is distinct from courtier, "for the king employed his familiares on a variety of administrative tasks."[3]
The familiares of a king are collectively referred to as the familia regis, which evolved into a private royal council—in England during the reign of Henry III (1216–72) and in France during that of Philip V (1316–22). In England, it was known as the concilium familiare or concilium privatum (Privy Council) and in France as the magnum consilium (great council, the Conseil du Roi).[4] The familiares regis may have already formed an inner royal council in Sicily during the reign of Roger II (1130–54).[5]