The gens Sempronia was one of the most ancient and noble houses of ancient Rome. Although the oldest branch of this gens was patrician, with Aulus Sempronius Atratinus obtaining the consulship in 497 BC, the thirteenth year of the Republic, but from the time of the Samnite Wars onward, most if not all of the Sempronii appearing in history were plebeians. Although the Sempronii were illustrious under the Republic, few of them attained any importance or notice in imperial times.
Praenomina
The praenomina favored by the patrician Sempronii were Aulus, Lucius, and Gaius. The plebeian families of the gens used primarily Gaius, Publius, Tiberius, and Marcus. The Tuditani used Marcus, Gaius, and Publius, while their contemporaries, the Gracchi, used Tiberius, Gaius, and Publius. Some families, including the Rutili and Muscae, used Titus instead of Tiberius.
Branches and cognomina
Of the many branches of the Sempronia gens, the only family which was certainly patrician bore the cognomen Atratinus, a surname originally describing someone clad in black or mourning attire. Several of this family attained the highest offices of the Roman state under the early Republic, but the name does not occur again until 34 BC. Given the fashion for reviving old surnames in the late Republic, it seems improbable that this represented the direct line of the Sempronii Atratini, returning to prominence after more than three centuries in eclipse.
Most or all of the other stirpes of the Sempronii were plebeian. Their surnames included Asellio, Blaesus, Densus, Gracchus, Longus, Musca, Pitio, Rufus, Rutilus, Sophus, and Tuditanus. Along with Atratinus, Gracchus and Pitio are found on coins.
Sophus, referring to someone regarded as "wise", belonged to a small, plebeian family that flourished from the time of the Samnite Wars down to the middle of the third century BC. Blaesus, originally indicating someone known for stammering, was the surname of a plebeian family that attained prominence during the Punic Wars. Tuditanus, which the philologist Lucius Ateius Praetextatus supposed to have been bestowed upon one of the Sempronii with a head like a , or mallet, belonged to a family that flourished during the latter half of the third century BC.
Longus was a common surname, which usually referred to a person who was quite tall, although it could also mean "tedious". This family was prominent for a few decades, beginning around the start of the Second Punic War. Rutilus, or "reddish", usually referred to the color of someone's hair, and it marks a family that first appears in the early second century BC. A diminutive of Rufus, red, it may have belonged to the same family that later bore that surname. The cognomen Musca refers to a fly, a nickname might allude to someone's height, in contrast to Longus, or could refer to a person's persistence.
The Sempronii Gracchi were the most distinguished family of the gens. They belonged to the plebeian nobility, obtaining their first consulship during the First Punic War, and remaining prominent for over a century. Their surname, Gracchus, indicated a jackdaw. The Sempronii Gracchi included several accomplished statesmen and generals, but they are perhaps better remembered for the brothers Tiberius and Gaius Gracchus, who were martyred in the cause of agrarian reform. A few members of this family are mentioned under the early Empire, but they were of little consequence.
Members
Sempronii Atratini
Aulus Sempronius Atratinus, consul in 497 BC. Aulus Sempronius A. f. Atratinus, one of the first three consular tribunes in 444 BC, was compelled to resign along with his colleagues, as a result of a defect in the auspices. Lucius Sempronius A. f. Atratinus, elected consul in 444 BC, following the resignation of his brother and the other consular tribunes, became one of the first censors in 443. Aulus Sempronius L. f. A. n. Atratinus, consular tribune in 425, 420, and 416 BC. Gaius Sempronius A. f. A. n. Atratinus, consul in 423 BC. Aulus Sempronius Atratinus, magister equitum in 380 BC.
Sempronii Sophi
Publius Sempronius P. f. C. n. Sophus, consul in 304 BC and censor in 300, triumphed over the Aequi. Publius Sempronius P. f. P. n. Sophus, consul in 268 BC, and censor in 252.