Cestui que

Cestui que (/ˈsɛstwi ˈkeɪ/; 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" (/ˈsɛtikeɪ/) or "sesty-kay" (/ˈsɛstikeɪ/). According to Roebuck, Cestui que use is pronounced "setticky yuce" (/ˌsɛtɨkiˈjuːs/). 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.