RMS Lusitania
One of his daughters, Jessie Muriel, married, as her first husband, the couturier Edward Molyneux. His second-born son, James A. Dunsmuir Jr., died in the sinking of the "RMS Lusitania" in 1915. His last child, Dola Dunsmuir, married Lieutenant-Commander Henry Cavendish and was rumored to be Tallulah Bankhead's lover.