Dietrich Stoyan (born 1940, Germany) — mathematician, statistician; student of Mathematics at Technical University Dresden; applied research at Deutsches Brennstoffinstitut Freiberg, 1967 PhD, 1975 Habilitation.
Since 1976 at TU Bergakademie Freiberg, Rektor of that university in
1991—1997; he became famous by his statistical research of the diffusion of euro coins in Germany and Europe after the introduction of the euro in 2002.