The gens Lutatia, occasionally written Luctatia, was a plebeian family of ancient Rome. The first of the gens to obtain the consulship was Gaius Lutatius Catulus in 242 BC, the final year of the First Punic War. Orosius mentions their burial place, the sepulchrum Lutatiorum, which lay beyond the Tiber.^[1][2]

The chief praenomina used by the Lutatii of the Republic were Gaius and Quintus, from which they rarely deviated; but there are also instances of Gnaeus and Marcus, which were probably given to younger children.

The surnames of the Lutatii under the Republic were Catulus, Cerco, and Pinthia, of which only the second is found on Roman coins.

• Catulus, borne by the most famous family of the Lutatii, is probably derived from the same root as Cato, which originally described someone shrewd, wise, or cautious (catus). An alternative explanation would translate the surname as "puppy, whelp" or "cub".
• Cerco, borne by some of the Catuli, refers to a tail.^[3][4]

This list includes abbreviated praenomina. For an explanation of this practice, see filiation.

• Gaius Lutatius, grandfather of the consuls of 242 and 241 BC.
• Gaius Lutatius C. f., father of the consuls.
• Gaius Lutatius C. f. C. n. Catulus, consul in 242 BC, he had command of the Roman fleet at the Battle of the Aegates, and defeated the Carthaginian fleet under Hanno II the Great, after which Carthage agreed to negotiate an end to the war.^{[5][6][7][8][9][10][11]}
• Quintus Lutatius C. f. C. n. Cerco, consul in 241 BC, helped negotiate the terms of the treaty with Carthage. Soon afterward, there was a revolt at Falerii; Lutatius and his colleague defeated them and triumphed. He was censor in 236, but died during his year of office.^{[12][13][14][15][16][11][17]}
• Gaius Lutatius C. f. C. n. Catulus, consul in 220 BC.^[18]
• Quintus Lutatius Catulus or Cerco, triumvir monetalis between 206 and 200 BC.^[19][20]
• Gnaeus Lutatius Cerco, one of the ambassadors sent to Alexandria in 173 BC.^[21]
• Gnaeus Lutatius Cn. f. (Cerco), a senator c. 140 BC.^[22][23]
• Quintus Lutatius Cerco, a quaestor in 109 or 108 BC. He minted coins celebrating the Battle of the Aegates during his magistracy.^[24][25][26]
• Quintus Lutatius Q. f. Catulus, an orator, poet, and writer of prose. He was consul in 102 BC, with Gaius Marius as his colleague. They fought against the Cimbri and Teutones. Later, during the civil war between Marius and Sulla, Catulus took his own life rather than face the partisans of his former colleague. His wife was Servilia.^{[27][28][29][30][31][32][33][34]}
• Quintus Lutatius Q. f. Q. n. Catulus Capitolinus, consul in 78 BC, and censor in 65. A prominent senator, Catulus supported Sulla during the civil wars. He married a sister of Quintus Hortensius, the orator, who in turn married a sister of Lutatius.^{[35][36][37][38][39][40][41][42]}
• Lutatia Q. f. Q. n., the wife of the orator Hortensius. Her daughter, Hortensia, inherited her father's rhetorical skills.^[43][44][45]

• Marcus Lutatius Pinthia, an eques who lived in the middle part of the second century BC.^[46]
• Lutatius, the author of a history titled Communis Historia, sometimes attributed to Gaius Lutatius Catulus, but probably by another Lutatius, since Cicero does not mention it among Catulus' works.^[47][48][49]
• Lutatius Daphnis, a grammarian, originally purchased as a slave by Quintus Lutatius Catulus, but afterward manumitted.^[50]
• Quintus Lutatius Diodorus, became a Roman citizen under Sulla, at the behest of Quintus Lutatius Catulus. He settled at Lilybaeum, where he was victimized by Verres.^[51]
• Lutatius, a scholiast on Statius.

• List of Roman gentes