| Abbreviation | Praenomen |
| A. | Aulus |
| Ap(p). | Appius |
| C. | Gaius |
| Cn. | Gnaeus |
| D. | Decimus |
| L. | Lucius |
| M. | Marcus |
| M'. | Manius |
| N. | Numerius |
| P. | Publius |
| Q. | Quintus |
| Ser. | Servius |
| Sex. | Sextus |
| S. or Sp. | Spurius |
| T. | Titus |
| Ti. or Tib. | Tiberius |
| V. | Vibius |
The same praenomina tended to be used again and again in families; in particular, the first-born son was named after his father. The Roman orator Cicero registered the birth of his son as follows:
M. TULLIUS CICERO M[arci] F[ilius] M[arci] N[epos] M[arci] PR[onepos] COR[nelia tribu], “Marcus Tullius Cicero, the son of Marcus, the grandson of Marcus, the great-grandson of Marcus, of the Cornelian voting tribe.”
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