Isabella Countess of Atholl, suo jure ^{1 2 3}

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Isabella married Thomas of Galloway, Earl of Atholl, jure uxoris, son of Roland or Lachlan Lord of Galloway, Constable of Scotland and Helen DE MOREVILLE, before January 1210.^{1 2} (Thomas of Galloway, Earl of Atholl, jure uxoris was born about 1180, died in 1231 ⁴ and was buried in 1231 in Coupar Abbey, Angus, Scotland ².)

  Marriage Notes:

"Thomas, who married Isabella, Countess of Atholl, and became Earl of Atholl in her right."

from Scots Peerage (vol 4)


" Before January 1210 he married Isabella (d.a.1242), daughter of Henry, earl of Atholl, from which he received the title of earl of Atholl."

from poms website


"ISABELLA, eldest daughter of Earl Henry and of his Countess Margaret, succeeded to her father as Countess of Atholl, in her own right. A claim was, however, made by her sister which was decided against by King Alexander II. in Parliament, who adjudged the earldom to Isabella as the eldest daughter. Little is known of her apart from her husband, Thomas of Galloway, who was son of Roland, Lord of Galloway, and brother of Allan of Galloway, both Constables of Scotland, and who through her was styled Earl of Atholl."

from Scots Peerage (vol 1) ^{1 2 3}