Dion Martinez
Dión M. Martínez was a Cuban–born American chess master.
He was regarded as one of the strongest chess players in Philadelphia. There he played several matches against James Mason, Wilhelm Steinitz, and Johannes Zukertort.
He took 9th at Philadelphia 1876, and tied for 17-18th at New York 1889. The New York Times of 16 June 1889 describes him as "Dion Martinez of Philadelphia is rather an elderly gentleman, tall and dignified. He was regarded as one of the strongest chessplayers in Philadelphia, but has not practiced much for two years past, and financial adversities have tended to detract his mind from the game.".