Trip to Wikipedia is in order:
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.
This is going to make Deb’s day when she sees it. Thank you, Stuart!