Gnaeus Pompeius may refer to:
Relatives of Pompey the Great
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edit- Gnaeus Pompeius Trogus (1st century BC), a Roman historian who adopted the nomen Pompeius from Pompey the Great after serving in Pompey's war against Quintus Sertorius
- Gnaeus Pompeius (consul 31 BC) (died 14 AD), possibly the great-grandson of the Roman dictator Lucius Cornelius Sulla, suffect consul in 31 BC