marquis

Etymology

From Middle English markis, from Old French markis, marchis, from Late Latin marchensis, from Old High German marcha and Frankish *marku, from Proto-Germanic *markō, from Proto-Indo-European *marǵ- (“edge, boundary”). Meaning is “lord of the march”, in sense of march (“border country”).

noun

1. A nobleman in England, France, and Germany, of a rank next below that of duke, but above a count. Originally, the marquis was an officer whose duty was to guard the marches or frontiers of the kingdom. The office has ceased, and the name is now a mere title conferred by letters patent or letters close.
2. Any of various nymphalid butterflies of the Asian genus Bassarona (or Euthalia).