Riadis was born in Thessaloniki, Ottoman Empire, now in Greece. He had his first music lesson in harmony and piano with a friend of Wagner's, Dimitrios Lalas. He also studied at the Munich Music Acade

Macedonians, also known as Macedonian Greeks, Greek Macedonians or Makedonians, are a regional and historical population group of ethnic Greeks, inhabiting or originating from the Greek region of Mace