Brown Brothers may refer to:Brown Bros. & Co. a bank, later merging to become Brown Brothers Harriman & Co. Brown Brothers Harriman & Co., the oldest and largest private bank in the United States Brown Brothers Milawa Vineyard, an Australian wine company Brown Brothers Tobacco Company, a 19th-century Detroit cigar manufacturing business Brown Brothers, a Scottish engineering company incorporated into Vickers plc Brown Brothers of Great Eastern Street, London, UK, manufacturer of the Brown quadricycle first sold in 1899 Six Brown Brothers, a jazz sextet