Gustaf Adrian Dahl was a Swedish pianist and composer. Dahl was a student of Hilda Thegerström, Ludvig Norman, Wilhelm Heintze and later Charles-Marie Widor and Camille Saint-Saëns. He shows in his choral works, piano pieces and songs, some French nyromantiskt influence. Dahl was also active as a piano teacher and music critic in the Swedish Morgonbladet from 1908