She is not known to have any siblings that reached the age of majority other than Ptolemy.[1][2] Her father Juba II of Numidia, was a son of king Juba I of Numidia (a king of Numidia of Berber descent from North Africa, who was an ally of Roman General Pompey). Her mother Cleopatra Selene II was a daughter of Ptolemaic Greek queen Cleopatra VII of Egypt from her marriage to Roman Triumvir Mark Antony. Drusilla was of Berber, Greek and Roman ancestry.