Franz Seraphin Lauska , baptised as Franciscus Ignatius Joannes Nepomucensis Carolus Boromaeus, was a Moravian pianist, composer, and teacher of Giacomo Meyerbeer and Felix Mendelssohn . The name "Seraphin" was a later name affix, which Lauska never used. Lauska was considered "one of the most brilliant executants of his time."