Guillermo Hernandez can refer to
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Willie Hernández
Guillermo Hernández Villanueva (born November 14, 1954) is a Puerto Rican former baseball relief pitcher
In baseball and softball, a relief pitcher or reliever is a pitcher who enters the game after the starting pitcher is removed becaus ...
(1954–2023), Puerto Rican baseball player
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Gilmer Hernandez, police officer
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Guillermo Hernández-Cartaya (born 1932), banker
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Guillermo Hernandez (tennis), Filipino tennis player
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Guillermo Hernández (footballer, born 1942), Mexican football defender
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Guillermo Hernández (footballer, born 1971), Mexican football manager and former defender
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