Þórunn Ormsdóttir

Thorunn Ormsdottir (; died 1431) was a prioress and directed of the Benedictine convent Reynistaðarklaustur in Iceland, along with . Thorunn ran the convent from 1402 until she died in 1431, although she was never promoted to abbess; there was not an abbess from when Ingibjörg Örnólfsdóttir died during the black plague until 1437.

On February 4, 1431, Bishop Jón Vilhjálmsson Craxton inducted eight nuns to the convent: . They pledged themselves to chastity, obedience to their superiors, and poverty. However, not all of nuns kept the first part of their vow and, a short while later, gave birth to a child fathered by Reverend , a priest in Hólar in Hjaltadalur. It came to light that she had become pregnant before becoming a nun. Moreover, during the next year, , who had not been in the convent for long, also gave birth to a child. The child's father was , a butler in Hólar. Bishop Jón was lenient on these violations and was sentenced to make a pilgrimage to Rome. He and Þóra had another child together later on.

This was a big scandal and it was difficult for prioress Thorunn who seems to have died shortly after. Þóra Finnsdóttir, one of the newly inducted sisters, became the prioress afterwards.