Apolonio Castillo

In this Spanish name, the first or paternal surname is Castillo and the second or maternal family name is Díaz.

Apolonio Castillo

Personal information
Born	(1921-05-23)May 23, 1921 Tecpan de Galeana, Guerrero, Mexico
Died	March 11, 1957(1957-03-11) (aged 35) Acapulco, Mexico
Sport
Sport	Swimming
Medal record Representing Mexico Central American and Caribbean Games 1946 Barranquilla 200m breaststroke 1946 Barranquilla 4x200m freestyle relay

Apolonio Castillo Díaz (23 May 1921 – 11 March 1957) was a Mexican swimmer who competed in the 1948 Summer Olympics and 1952 Summer Olympics in butterfly stroke. Castillo was a close friend of Ramón Bravo, he taught the photographer and underwater filmmaker to dive.

Díaz died in Acapulco at the age of 35, after diving in the waters of the bay trying to rescue the bodies of Joseph Arthur Mitchel and Edith Hallock, two elder American tourists who were victimized by the Texan Rudy Fenton Cavalzono and the boatman Daniel Ríos Ozuna days before in the Bay of Acapulco and whose approximate depth is 200 feet (61 meters). In the last search Castillo floated but suffered a decompression accident and three days later he was taken to the hyperbaric chamber of the Naval Base, where on March 11, 1957, Díaz died.