In 1916, Schmitt married his first wife, Pavla Dorotić, a Serbian woman who pretended to be a countess. They were divorced, though an appeal to the Catholic Church for an annulment was rejected. In 1926 he married his second wife, Duška Todorović (1903–1950), also Serbian; they had a daughter, Anima. Schmitt was excommunicated because his first marriage had not been annulled. In 1957 his daughter married Alfonso Otero Valera (1925–2001), a Spanish law professor at the University of Santiago de Compostela and a member of the ruling Spanish Falange party under the Franco régime. She translated several of her father's works into Spanish. Letters from Schmitt to his son-in-law have also been published.