(Tarbell)
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Line 193
6. HUMPHREY DE BOHUN IV, Baron de Bohun, Lord of Hereford, constable of England, d. 1182; m. 1175, MARGARET OF HUNTINGDON (97-26), (CP I: 22, VII: 457).

line 97
26. MARGARET OF HUNTINGDON (96-26); m. (2) 1175, HUMPHREY IV DE BOHUN (193-6), d. 1182. (CP IV: 669, VI: 457; SP I: 4).
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Wikipedia
Margaret of Huntingdon was a Scottish princess and Duchess of Brittany. She was the sister of Scottish kings Malcolm IV and William I, wife of Conan IV, Duke of Brittany, and the mother of Constance, Duchess of Brittany. Her second husband was Humphrey de Bohun, hereditary Constable of England.
Born: 1145, Died: 1201
Spouse: Humphrey de Bohun (m. 1171–1182), Conan IV, Duke of Brittany (m. 1160–1171)
Children: Constance, Duchess of Brittany, Henry de Bohun, 1st Earl of Hereford
Parents: Henry of Scotland, Ada de Warenne
Siblings: William the Lion, Malcolm IV of Scotland
Margaret was born in 1145, the second eldest daughter of Henry of Scotland, Earl of Huntingdon and Northumbria, and Ada de Warenne. In 1152, when she was seven years of age, her father died.