Klaus Wagn (1937–2021) was a German author[1] and former husband of Argentine-German writer Esther Vilar. They were married for 14 years (1961–1975) and they had a son named Martin in 1963. Vilar said in 1975 they had a divorce, but claimed: "I didn't break up with the man, just with marriage as an institution."[2] He died October 2021.[citation needed]