Ganymedes (died early 47 BC) was a eunuch in the court of Cleopatra VII who proved an able adversary of Julius Caesar.
She executed Achillas, who was the general of the army and Pothinus's co-conspirator in the murder of Pompey, and appointed Ganymedes in his stead.
[2] Two days after Caesar frustrated Ganymedes' ploy, the Thirty-Seventh Legion, traveling by sea and also desperately short of water, arrived in Egypt but was unable to land at Alexandria due to contrary winds.
However, Ganymedes succeeded in rallying them once again, and prepared a larger fleet for another engagement, which this time he was sure he could win.
This battle, however, against Caesar's admiral Euphranor, resulted in an even more devastating defeat for Ganymedes.