Karl Friedrich Henckell was a German author, poet, and publisher.

Karl Friedrich Hensler was a dramatist and theatre manager in Vienna.

Karl Friedrich Hermann was a German classical scholar and antiquary.

Karl Friedrich Neumann was a German orientalist.

Karl Friedrich Stäudlin was a German Protestant theologian born in Stuttgart.

Karl Friedrich Vollrath Hoffmann was a German geographer.

Karl Friedrich Wilhelm Rußwurm was a German-Estonian pedagogue, ethnologist and historian.

Karl Fuchs was an ethnic German from Kazan in Tatarstan. He founded the Kazan Zoo in 1806, as well as the Botanical Museum in Kazan. He served as the Rector of Kazan University from 1823 to 1827.

Karl Gerok was a German preacher and religious poet.

Karl Friedrich Ludwig Goedeke was a German historian of literature, an author, and a professor.