This name derives from the Roman praenomen and cognomen “Drusus”, typical of the clan Claudia and Livia and then inherited by the Julio-Claudian dynasty. The name could derive from the Old Celtic “*dru- > Drausus”, meaning “strong, courageous, valiant”. 1) Drusus Julius Caesar (7–33 AD), was a member of the Julio-Claudian or Imperial family of Ancient Rome. He was a son of Germanicus and Agrippina the Elder. He was brother to Emperor Caligula, nephew to Emperor Claudius. 2) Drusus the Elder (38–9 BC) was a Roman politician and military commander. He was a patrician Claudian on his legal father's side but his maternal grandmother was from a plebeian family. 3) Drusilla (38–79 AD) was a daughter of Herod Agrippa I and thus sister to Berenice, Mariamne and Herod Agrippa II. 4) Drusilla of Mauretania may be the Drusilla mentioned by Tacitus as a granddaughter of Antonius and Cleopatra. If so, she would have been a princess of Mauretania, the youngest child of queen Cleopatra Selene II and king Juba II and a sister to king Ptolemy of Mauretania.