The name Septimus means Seventh and is of Latin origin. Septimus is a name that's been used primarily by parents who are considering baby names for boys.
Septimius Severus, born Lucius Septimius Severus Pertinax on or around 145, was a Roman emperor from 193 to 211. He founded a personal dynasty and converted the Roman government to a monarchy. His reign marked a critical stage in politics that later influenced the Roman Empire.