Lucius Domitius Ahenobarbus
Ahenobarbus's father, Lucius Domitius Ahenobarbus, had been Consul in 54 BC. His mother was Porcia Catonis, sister of Cato the Younger and half-sister of the two Servilias: Servilia Major (Caesar's mistress) and Servilia Minor (second wife of Lucullus).