marquis (n.)

also marquess, c. 1300, marchis, title of nobility, from Old French marchis, marcheis, marquis, etymologically "a prefect of the marches, ruler of a border area," from Old French marche "frontier," from Medieval Latin marca "frontier, frontier territory" (see march (n.1)). Originally the ruler of border territories in various European regions (compare Italian marchese, Spanish marqués, and see margrave); later a mere title of rank, below duke and above earl or count. Related: Marquisate.

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Definitions of marquis from WordNet
marquis (n.)
nobleman (in various countries) ranking above a count;
Synonyms: marquess
Marquis (n.)
humorist who wrote about the imaginary life of cockroaches (1878-1937);
Synonyms: Don Marquis / Donald Robert Perry Marquis