'Pegasus' originates from Greek, specifically the word 'Pēgasos', where 'pēgē' meant 'spring' or 'fountain'.

'Pēgasos' transformed into the Latin word 'Pegasus', and eventually became the modern English word 'Pegasus'.

Initially, it referred to a specific mythological creature, but over time it evolved to represent any winged horse in mythology.