Moscheles was born 1794 in Prague, Bohemia, the son of Klara Popper (Lieben) and Joachim Moises Moscheles. He was from an affluent German-speaking Jewish merchant family. His first name was originally Isaac. His father played the guitar and was keen for one of his children to become a musician. Initially his hopes fixed on Ignaz's sister, but when she demurred, her piano lessons were transferred to her brother. Ignaz developed an early passion for the (then revolutionary) piano music of Beethoven, which the Mozartean Bedřich Diviš Weber, his teacher at the Prague Conservatory, attempted to curb, urging him to focus on Bach, Mozart and Muzio Clementi.