Two entries with the name Queen of Orkney.

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Queen of Orkney

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The sister of Adalon and the lord of the Narrow Borderland.

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Queen of Orkney

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Mother of Agravain, Gareth, Gaheris, Gawaine, and their half-brother Mordred.

She had an affair with Lamorat, son of Pellinore, an enemy of the family. When they were discovered, Gaheris killed his mother and his brothers slew Lamorat.

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See also
Margawse of Orkney | The Legend of King Arthur
Morchades | The Legend of King Arthur

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Sources
Post-Vulgate Suite du Merlin | 1230-1240
Prose Tristan | 1230-1240

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