Marcus Licinius Crassus (consul 30 BC)
Marcus Licinius Crassus the Younger, also known as Marcus Licinius Crassus Dives, (flourished 1st century BC), grandson of the triumvir Marcus Licinius Crassus, was a Roman Consul in the year 30 BC, along with Octavian, the (future Roman Emperor Augustus). He was best known for his successful campaigns in Macedonia and Thrace in 29-27 BC, for which he was denied customary military honors by Octavian.
Military career 
Crassus was a Roman general, who fought first with Sextus Pompeius and Mark Antony before defecting to Octavian. Octavian then appointed him as his colleague as consul for 30 BC, even though Crassus had not been praetor, the office that was traditionally a prerequisite for the consulship. Dispatched to Macedonia in 29 BC, he moved against the Bastarnae, a tribe of Scythian ethnicity who had crossed the Danube and threatened Roman allies in neighboring Thrace. He drove them back toward the Danube and finally defeated them in pitched battle, killing their King Deldo in single combat. By Roman tradition, he was thus entitled to the Spolia opima, but Octavian blocked the privilege, apparently wishing to downplay the successes of individual generals in favor of his own prestige. Crassus likewise did not receive the agnomen of Scythicus to commemorate his victory. However, Octavian eventually did grant him a triumph upon his return to Rome.
The younger Crassus was the son of another Marcus Licinius Crassus, possibly by his wife Caecilia Metella Cretica, daughter of the consul Quintus Caecilius Metellus Creticus (see Caecilius Metellus); his mother's tomb is visible on the Appian Way. The father was a Quaestor to Julius Caesar, and a son, possibly the eldest son, of the triumvir Marcus Licinius Crassus possibly by his first wife (widow of an elder brother killed in December 87 BC). Crassus the Younger apparently had no surviving sons by his wife. He adopted the future consul Marcus Licinius Crassus Dives from the Calpurnius Piso family.
- Cassius Dio 51.23.3 ff. 
- "Legio III Scythica" .
- Details of his genealogy are taken from the German Wikipedia; however, most historical sources online say that the eldest son was named Publius, the traditional name of the eldest son in the Licinius gens. Publius died in Syria with his father in 53 BC.