Jean Cras was a French composer and naval officer from Brest, Brittany, born in 1879, whose musical career developed alongside his service in the French navy in the late 19th and early 20th centuries. Working primarily in the classical tradition, his output includes opera, chamber music, piano pieces and mélodies that combine late-Romantic harmony with modal inflections and elements of Breton folk music, reflecting his naval career and the maritime culture of Brittany.