Gillie, of Scottish origin, is a diminutive of the male given name Gilbert. The name means "bright" or "shining," reflecting its connection to the French word 'brilliant'. It was popularized during the Middle Ages by the Norman Conquest of England and has since been widely used throughout Scotland and Ireland.
"Gillie saw its highest popularity during the early 1900s, with a peak of 16 births in 1896. However, it steadily declined thereafter, reaching as low as 5 births in certain years between 1935 and 1941. The total number of Gillie births recorded over this period is 322."