Denis Dowling Mulcahy
Denis Dowling Mulcahy (1833 - September 1900) was a leading member of the Irish Republican Brotherhood and a medical doctor.
Denis Dubourdieu (July 1, 1949 – July 26, 2016) was a French winemaker and professor of oenology at the University of Bordeaux. He managed or co-managed several properties in Bordeaux, including Château Reynon, Château Doisy Daëne, Château Cantegril, Château Haura, and Clos Floridène. He also consulted at Château Cheval Blanc.
Denis Gauthier, Jr. (born October 1, 1976) is a Canadian former professional ice hockey defenceman. A first round selection of the Calgary Flames at the 1995 NHL Entry Draft, Gauthier played for the Flames, Phoenix Coyotes, Philadelphia Flyers and Los Angeles Kings during his ten-season National Hockey League (NHL) career.
Denis Mondor is a judge and former high-profile lawyer in the Canadian province of Quebec.