Cairistíona Nic Ruaidhrí

Christina of Garmoran
Noble family	Clann Ruaidhrí
Spouse(s)	Duncan
Issue Ruaidhrí
Father	Ailéan mac Ruaidhrí

Christina of Garmoran also known as Christina MacRuari, Christina of Mar and Christiana of the Isles was a 14th-century Scottish noblewoman who was the legitimate child of Ailéan mac Ruaidhrí, chief of Clann Ruaidhrí. She married Duncan, second son of Domhnall I, Earl of Mar.

Christina was a direct descendant of the King of the Hebrides, Somhairle mac Gille-Brighde (better known as Somerled), through her grandfather Ruaidhri mac Raghnaill, the founder of Clann Ruaidhrí.

Her father, Ailéan mac Ruaidhrí, possessed the "North Isles" of the Uists and Benbecula. He is known to have attended Parliament in 1285 when the succession of Margaret, Maid of Norway was debated. He had died by 1296, by which time he had fathered two illegitimate sons, Ruaidhrí and Lachlann, and Christina, his sole legitimate heir. However, When Christina succeeded to the extensive estates of her father (Garmoran and the North Isles including Harris and the Small Isles of Rùm and Eigg) she resigned a large proportion of them to Ruaidhrí.

When her distant cousin Alexander of Argyll's support of the opponents of King Robert the Bruce led to the forfeiture of his lands, they were distributed between her MacDonald cousin Aonghas Óg of Islay and her brother Ruaidhrí. The latter received much of Lorne and parts of Lochaber. Bruce was however careful to ensure his interests in the west were protected and Dunstaffnage Castle was given not to Ruaidhrí, now styled the "High Chief of Lorn" but to a royal constable, Arthur Campbell. Campbell's son, also Arthur, received a charter of lands from Christina, at some point early in the 14th century and they may have been considering marriage although this never came to pass. The charter itself seems to have been disputed by parties on both sides for the next century.

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