Nicknames:
Perse, Persy (or Percy).
Famous people named Perseus:
Perseus, the last king of the Antigonid dynasty.
Fun fact:
Your little Perseus might be interested in reading the adventures of Perseus "Percy" Jackson in Rick Riordan's Percy Jackson and the Olympians series.
More Inspiration:
Pleasant P Names For Baby Boys, Liam, Alex, And Beyond: Boy Names With Natural Nicknames, Perfect 3-Syllable Boy Names, Legendary Baby Names Inspired By Mythology,