Raul Sapena Pastor Guérin (9 October 1908 – 15 June 1989) was a Paraguayan lawyer, diplomat, professor and judge who served as foreign minister of the Republic of Paraguay from 1956 to 1976.

[2] Near the end of the Chaco War, he married Juana Brugada Montero,[3] with whom he lived all his life and had 4 children: Graciela Josefina, Raúl Ricardo, Rubén Adolfo and Gloria Susana.

Later on his life he would also obtain an honorary degree from the University of Rio de Janeiro in Brazil.

A few years after his graduation, the Chaco War began, and Raúl volunteered for service, becoming an officer in the Paraguayan Army with the rank of lieutenant.

He was named Minister of Foreign Affairs when he was 48, and he held the position for a record 20 years; afterwards he resigned and assumed a seat in the Senate.