From the Late Latin name
Aegidius, which is derived from Greek
αιγιδιον (aigidion) meaning "young goat". Saint Giles was an 8th-century miracle worker who came to southern France from Greece. He is regarded as the patron saint of the crippled. In Old French the name
Aegidius became
Gidie and then
Gilles, at which point it was imported to England.