Ambrose Charles Drexel Greenway, 4th Baron Greenway (born 21 May 1941) is a British marine photographer and shipping consultant. He is one of the ninety hereditary peers elected to remain in the House of Lords after the passing of the House of Lords Act 1999, sitting as a crossbencher. In 2008, he was Commodore of the House of Lords Yacht Club. Since 1985, he has been married to Rosalynne Peta Fradgley.