The Collaborative International Dictionary
Cestui
Cestuy \Ces"tuy\ or ||Cestui \Ces"tui\, pron. [Norm. F.] (Law) He; the one.
Cestuy que trust[norm. F.], a person who has the equitable
and beneficial interest in property, the legal interest in
which is vested in a trustee.
--Wharton.
Cestuy que use[Norm. F.], a person for whose use land, etc., is granted to another.
Usage examples of "cestui".
March 31, 1787, agreed upon a partition of the said lands, which agreement was with the approbation and consent of the cestui que trusts, to wit: Earl and Lady Abingdon, and Charles Fitsroy and Ann his wife, the said Susannah Skinner the second not then having arrived at age.