Raoul Armand Jerzy (von) Koczalski was a Polish pianist and composer. He also used the pseudonym Georg Armand(o) Koczalski.

Karol Mikuli, also known as Charles Mikuli was a Polish pianist, composer, conductor and teacher. His students included Moriz Rosenthal, Raoul Koczalski, Aleksander Michałowski, Jaroslaw Zieliński, Kornelia Parnas and Heinrich Schenker.