In Scottish folklore the Ghillie Dhu or Gille Dubh was a solitary male faerie. He was kindly and reticent yet sometimes wild in character but had a gentle devotion to children. Dark haired and clothed in leaves and moss, he lived in a birch wood within the Gairloch and Loch a Druing area of the north-west highlands of Scotland.
Ghillie is an English equivalent of the Scottish Gaelic word Gille;Edward Dwelly, a Scottish lexicographer, lists gille as a lad, youth or boy with dubh translating as dark or dark haired.Gille dubh is articulated as gillie dhoo.
According to folklorist and scholar Katharine Briggs the Ghillie Dhu was a gentle and kind-hearted mountain spirit, or a "rather unusual nature fairy." The Ghillie Dhu was an individual male modern day fairy described by Osgood Mackenzie, a Scottish landowner and horticulturist, in his memoirs that were published in 1921. The fairy was generally timid, yet he could also be "wild".
Residing in the birch woods near Loch a Druing, in the north-west Highland area of Gairloch, he was mainly seen in the latter part of the 18th century. The woods are in a dip alongside a hilly area around 2 miles (3.2 kilometres) from where Rua Reidh Lighthouse was later built. One summer evening a young local child named Jessie Macrae wandered into the woods and became lost. Jessie was found by the Ghillie Dhu who looked after her until the next morning when he took her home. Over a period of four decades the fairy was frequently seen by lots of different people but Jessie was the only person he conversed with. Generally of a dishevelled appearance, he used green moss and leaves taken from trees as clothing. As implied by his name, he had black hair; he was of a small stature. His fondness of children is similar to that displayed by the little known Hyter sprite of English mythology.
Shortly after the episode with Jessie, a group of Mackenzie dignitaries were invited by the landowner, Sir Hector Mackenzie of Gairloch, to get together to hunt and capture the Ghillie Dhu. The team of five hunters congregated at the home of one of Mackenzie's tenants where they were provided with an evening meal before setting off on their mission to shoot the Ghillie Dhu. Despite searching extensively throughout the night, the hunters could not find their prey; according to Patricia Monaghan, a writer on Celtic mythology, the Ghillie Dhu was never seen again.