Andrey Markov
Andrey Andreyevich Markov was a Russian mathematician best known for his work on stochastic processes. A primary subject of his research later became known as the Markov chain. He was also a strong, close to master-level chess player.
14 June 1856
Born on the same birth day (14 June): Cy Coleman • Gene Barry • Jan Francisci • Joe Worsley • Kostas Manolas • Paul Boateng
Born in the same month (June 1856): H. Rider Haggard • Henry Chapman Mercer