The plane he was riding in crashed into the ocean.
Bob Roberto Clemente died on December 31, 1972. He died in a cargo plane delivering supplies to Puerto Rico. It crashed into the Atlantic Ocean. His body wasn't found, but his brief case washed up at shore.
Clemente Marroquín died in 1978.
Clemente Gaddi died in 1993.
Clemente Rebora died in 1957.
Clemente Bocciardo died in 1658.
Clemente Micara died in 1965.
Clemente Yerovi died in 1981.
Fernando Clemente died in 1998.
Clemente Peani died in 1782.
Clemente Palma died in 1946.
Nicholas Clemente died in 2009.
Clemente Ruta died in 1787.