Tetrarch of the Galatian tribe of the Trocmi and son-in-law of King Deiotarus; Diogenes and Philo were travelling to him when they parted from Cicero at Pessinus (Fam. 2.12, 50 BC). He later seized and massacred the Roman inhabitants of Heracleia Pontica (c. 35 BC) and was executed by Augustus after the battle of Actium.