Romulus, the twin brother of Remus, was the mythical founder of Rome in 753 BC. As possibly for Remus' name, Romulus is a name that almost certainly derives from that of Rome itself, so that it simply means 'Roman'.

The actual name of Rome is disputed: it may derive from an early name of the river Tiber that flows through it, this being Ruma or Rumon, or something similar, and itself perhaps related to Greek rheo, 'to flow'. The important thing here is that Romulus did not found Rome, Rome 'founded' him!