Gillie is a charming masculine name with Scottish and Irish roots. It originally functioned as a nickname for names like Gilbert, Gillian, or Guillaume (the French form of William). The name may derive from the Gaelic word 'gille,' meaning 'servant' or 'boy,' which was often used to refer to attendants or followers. As a standalone name, Gillie has a friendly, approachable quality with its soft sound and casual feel. Though relatively uncommon as a given name, it carries a rustic, old-world charm that appeals to parents seeking something distinctive yet accessible for their sons.