1) Appanage 2) Fringe benefit 3) Perk 4) Perquisite 1) Appanage 
privilege of office; especially one given to younger offspring
• (n.) Same as Appanage.
Ap'an·age noun Same as Appanage . 
Obs.Fr. French usage of giving lands to non-Heirs Royal of the Crown. These lands could not be sold, mortgaged, or used as a dowry, and passed back to the King in the extinction of the line.
Apanage was an allowance which the younger princes of a reigning house in some European countries received from the revenues of the country, generally together with a grant of public domains, that they may be enabled to live in a manner becoming their rank.