In Greek mythology, Perseus was the son of Zeus. Legend has it that he cut off Medusa’s head and turned a sea monster to stone with it. But your little Perseus will probably just collect snakes and rocks … because boys.
Perse, Persy (or Percy).
Famous people named Perseus:
Perseus, the last king of the Antigonid dynasty.
Your little Perseus might be interested in reading the adventures of Perseus "Percy" Jackson in Rick Riordan's Percy Jackson and the Olympians series.