Román Hernández Onna (23 November 1949 – 1 June 2021[1]) was a Cuban Grandmaster (GM) (1978), Cuban Chess Championship winner (1982).
From the 1970s to the 1990s, Román Hernández Onna was one of Cuba's leading chess players.
One of his greatest successes in the international arena was in 1977 in a strong chess tournament in Las Palmas, where Román Hernández Onna shared the 4th place with Mikhail Tal and Walter Browne behind Anatoly Karpov, Bent Larsen and Jan Timman, and won parties against Larsen and Tal.
In the same year, he also shared the 2nd place with Oscar Panno and Ulf Anderssonin Biel Chess Festival behind Anthony Miles.
Román Hernández Onna played for Cuba in the Chess Olympiads:[2] Román Hernández Onna played for Cuba in the World Team Chess Championship:[3] Román Hernández Onna played for Cuba in the Pan American Team Chess Championships:[4] Román Hernández Onna played for Cuba in the World Student Team Chess Championships:[5] In 1975, Román Hernández Onna was awarded the FIDE International Master (IM) title, but in 1978 he was awarded FIDE Grandmaster (GM) title.