
In Gaelic legend, Sgáthach, or Scáthach, is a Scottish warrior. She features in the Ulster Cycle (Irish: an Rúraíocht) one of the four cycles in Irish mythology along with the Mythological Cycle, Fenian Cycle and the Historical Cycle (also known as the Cycles of the Kings). Sgáthach was said to be a warrior queen whose fortress, Dún Scáith or Dùn Sgàthaich (Fortress of Shadows) is named after her and is on the Isle of Skye (Scottish Gaelic: An t-Eilean Sgitheanach). The remains of Dunscaith Castle now stand on the site where her fortress was once said to be located.
Sgáthach trained the legendary Irish hero Cú Chulainn, who also appears in Scottish and Manx folklore. He is said to be the son of Lugh, a god in Irish mythology and member of the pre-Christian Gaelic pantheon the Tuatha Dé Danann. In the Ulster Cycle, Lugh fathered Cú Chulainn with the mortal maiden Deichtine who was the sister of Conchobar mac Nessa the king of Ulster. The instruction of Cú Chulainn by Sgáthach is described in Tochmarc Emire (The Wooing of Emer), one of the stories in the Ulster Cycle. Cú Chulainn had fallen in love with Emer, daughter of Forgall Monach, who opposed to the match. He suggested that Cú Chulainn should complete his training as a warrior with Sqáthach in the land of Alba (Scotland) before marrying Emer. Forgall’s expectation was that Cú Chulainn would be killed in the process.