Federico Krutwig Sagredo (1921–1998) was a Spanish Basque writer, philosopher and politician, author of several books.
Along with Felix Likiniano, he tried to create some resistance to the Francoist State after the Spanish Civil War.
The thought of both authors, melding Basque nationalism and Anarchism gave birth to a minor political current known as Anarkoabertzalism (Anarcho-nationalism), which eventually merged within the hybrid of Marxism and Anarchism known as Autonomism.