Giles

wiktionary

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Medieval English form of Old French saints' name Giles, modern Gilles, an altered form of Latin Aegidius, from Ancient Greek Αἰγίδιος(Aigídios), derivative of αἰγίδιον(aigídion, “kid, young goat”).

etymonline

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Giles

masc. proper name, from Old French Gilles, from Latin Egidius, Aegidius (name of a famous 7c. Provençal hermit who was a popular saint in the Middle Ages), from Greek aigidion "kid" (see aegis). Often used in English as a typical name of a simple-minded farmer.