On her father's side, she was the granddaughter of Ferdinand III of Castile, and his first wife, Elisabeth of Swabia.
On her mother's side, she was the granddaughter of James I of Aragon, and his second wife, Violant of Hungary.
[2] The marriage proposal failed with the death of the young Theobald after he fell from a battlement at the castle of Estella in 1273.
Later, in 1282, she married Diego López V de Haro, Lord of Biscay.
[3] In her marriage to Diego López V de Haro, Lord of Biscay, they had four children: