subvassalage
/ˌsʌbˈvas(ə)lɪdʒ/Now historical
noun
Originally: †an estate or fief held by a subvassal (obsolete ). Later: the state or condition of being a subvassal. Now chiefly: = subinfeudation.
Origin
Mid 18th century; earliest use found in Patrick Murdoch (d. 1774), Church of England clergyman and writer. From sub- + vassalage, originally after German Afterlehn, in later use after subvassal.