From the Greek
Πηγασος (Pegasos), possibly either from
πηγος (pegos) "strong" or
πηγαιος (pegaios) "from a water spring". In Greek mythology Pegasus was the winged horse that sprang from the blood of Medusa after she was killed by
Perseus. There is a constellation in the northern sky named after the horse.
There were no related names found for Pegasus.