Caballero, Fernán, pseud. of Cecilia Böhl de Faber, 1796-1877, Spanish novelist and folklorist. Born in Switzerland, she spent most of her adult life in Andalusia, where her novels are set. They are marked by a didactic tone and sentimental plots, reflecting regional life and Caballero's own traditionalism. The first novel, La Gaviota (1849, tr. The Sea Gull, 1864), influenced the modern Spanish novel of customs.