| Name |
Origin of Name |
Time of Creation |
| I Adiutrix pia fidelis |
Assistant, i.e. raised to supplement the legionary strength |
Nero |
| I Italica |
Raised in Italy |
Nero |
| I Macriana |
Raised by Clodius Macer |
Nero |
| I Flavia Minervia |
After Minerva |
Domitian |
| I Parthica |
Raised for campaigns in the East |
Severus |
| II Adiutrix pia fidelis |
Assistant, i.e. raised to supplement the legionary strength |
Vespasian |
| II Augusta |
Raised by Augustus |
Augustan |
| II Italica pia |
Raised in Italy |
Marcus Aurelius in AD 165 |
| II Parthica |
Raised for campaigns in teh East |
Severus |
| II Traiana fortis |
Strong, raised by Trajan |
Trajan |
| III Augusta pia fidelis |
Formed by Augustus |
Augustan |
| III Cyrenaica |
Province where it gained distinction |
Pre-Augustan |
| III Gallica |
From the veterans of Caesar's Gallic legions |
Pre-Augustan |
| III Italica concors |
United, raised in Italy |
Marcus Aurelius in AD 165 |
| III Parthica |
Raised for campaigns in the East |
Severus |
| IV Flavia firma |
Steadfast, raised by Vespasian |
Vespasian in AD 70 |
| IV Macedonica |
Province where it gained distinction |
Augustan |
| IV Scythia |
Region where it gained distinction |
Pre-Augustan |
| V Alaudae |
The Lark, raised by Caesar |
Pre Augustan |
| V Macedonica |
Province where it gained distinction |
Pre-Augustan |
| VI Ferrata fidelis constans |
'Iron-sides', a nickname indicating their endurance |
Pre-Augustan |
| VI Victrix |
Victorious, given after an outstanding victory |
Pre-Augustan |
| VII Macedonica Claudia pia fidelis |
For its loyalty to Claudius during a mutiny in AD 42 |
Pre-Augustan |
| VII Gemina |
One legion made out of two |
Galba |
| VIII Augusta |
Reconstituted by Augustus |
Pre-Augustan |
| IX Hispana |
Province where it gained distinction |
Pre-Augustan |
| X Fretensis |
From the naval war between Octavian and Sextus Pompeius |
Pre-Augustan |
| X Gemina |
One legion made out of two |
Pre-Augustan |
| XI Claudia pia fidelis |
For its loyalty to Claudius during a mutiny in AD 42 |
Pre-Augustan |
| XII Fulminata |
'Lighting-hurler', probably gained under Caesar |
Pre-Augustan |
| XIII Gemina pia fidelis |
One legion made out of two |
Augustan |
| XIV Gemina Martia Victrix |
One legion made out of two |
Augustan |
| XV Apollinaris |
After the god Apollo |
Augustan |
| XV Primigenia |
After Fortuna Primigenia |
Caligula or Claudius |
| XVI Flavia firma |
Raised by Vespasian |
Vespasian in AD 70 |
| XVI Gallica |
Province where it gained distinction, possibly under Drusus |
Augustan |
| XX Valeria Victrix |
Gained distinction under Valerius Messalinus |
Augustan |
| XXI Rapax |
'Greedy' - in the sense of sweeping everthing before it |
Augustan |
| XXII Deiotariana |
Raised by Deiotarus |
Augustan |
| XXII Primigenia pia fidelis |
After Fortuna Primigenia |
Caligula or Claudius |
| XXX Ulpia victrix |
Raised by Trajan and called victorious presumably after distinguishing conduct in Dacia |
Trajan |