In the Middle Ages, a familiaris, more formally a familiaris regis or familiaris curiae, 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." 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."