Alfred Gwynne Vanderbilt (1877-1915)
May 7 American businessman (New York Central Railway), dies aboard the RMS Lusitania during World War I at 37
Anthony Wilding (1883-1915)
May 9 New Zealand tennis player (Wimbledon 1910-13), killed in action on the Western Front at 31
François Faber (1887-1915)
May 9 Luxembourgian cyclist (Tour de France 1909), killed in action by gunshot wounds at 28
- May 19 Bob Ferguson, Scottish golfer (British Open 1880, 81, 82), dies at 69