Andreu Nin i Pérez was a Spanish politician, trade unionist and translator. He is mainly known for his role in various Spanish left-wing movements of the early 20th century and, later, for his role in the Spanish Civil War. He is also known for his work translating Russian classics such as Ana Karenina, Crime and Punishment and some works by Anton Chekhov, from Russian into Catalan.

Jesús Hernández Tomás was a Spanish communist leader. During the Spanish Civil War (1936–1939) he was Minister of Education and Fine Arts, then Minister of Education and Health. After the war he went into exile in Oran, Moscow and then Mexico. He was expelled from the party in 1944 for disloyalty to the leadership, and purged from the official history of the party after writing a book in 1953 critical of the Stalinist role in the Civil War.