Ferdinand August Rojahn (1822-1900) was a German-born organist, violinist and conductor.
The son of Johan Friedrich Gottlieb Rojahn and Dorothe Philipine (Schünemann) Rojahn, he was violin and piano teacher to the Norwegian composer, violinist and conductor Sigurd Lie (born 1871).
Rojahn was a Stadmusikanten in Kristiansand, Norway.
Rojahn was married to Birgitte Cornelia Gulbrandsen (1839-1927); they had 6 children.
This article about a German musician is a stub.