ARRIERE n.
efly used as an adjective in the sense of behind, rear, subordinate. Arriere fee, Arriere fief, a fee or fief dependent on a superior fee, or a fee held of a feudatory. -- Arriere vassal, the vassal of a vassal.
BARON n.
A title or degree of nobility; originally, the possessor of a fief, who had feudal tenants under him; in modern times, in France and Germany, a nobleman next in rank below a count; in England, a nobleman of the lowest grade in the House of Lords, being next below a viscount.