William Nelson Darnborough (1869–1958) was an American gambler from Bloomington, Illinois, who was known for his success in roulette at Monte Carlo from 1904 to 1911. During that time period he amassed a fortune of $415,000.($11,374,844) in 2020 In one of the more legendary feats, Darnborough bet on the number 5 and won on five successive spins.