Cestui que (; also
cestuy que, "
cestui a que") is a shortened version of
cestui a que use le feoffment fuit fait, literally, "The person for whose use the
feoffment was made." It is a
Law French phrase of medieval
English invention, which appears in the legal phrases
cestui que trust,
cestui que use, or
cestui que vie. In contemporary English the phrase is also commonly pronounced "setty-kay" or "sesty-kay" . According to Roebuck,
Cestui que use is pronounced "setticky yuce" .
Cestui que use and
cestui que trust are more or less interchangeable terms. In some medieval materials, the phrase is seen as
cestui a que.