usufructuary
A person who holds property, or the use of assets, by usufruct; a fructuary.
[T]hat great Aſſembly des notables called by K. Francis the Firſt, to give their Judgment of the Articles of Peace lately made with the Emperour Charles V. at Madrid, their ſenſe was, that Burgundy which by thoſe Articles was to be delivered up, was an inſeparable Member of the Crown, of which he was but the uſufructuary, and ſo he could not diſpoſe of the one any more than of the other; […]
Where it comes from
From Late Latin ūsūfructuārius, from ūsūfructus (“a usufruct”) + -ārius (suffix forming a noun denoting an agent of use from another noun); compare French usufructuaire, Italian usufruttuario, Portuguese usufructuario.
Adapted from the Wiktionary entry usufructuary (CC BY-SA 4.0).