Dymphna was born in Ireland sometime in the seventh century to a pagan father and devout Christian mother. When she was fourteen, she consecrated herself to Christ and took a vow of chastity. Soon afterward, her mother died and her father - who had loved his wife deeply - began to suffer a rapid deterioration of his mental stability.

So unhinged was Dymphna's father, Damon, that the King's counselors suggested he remarry. Though he was still grieving for his wife, he agreed to remarry if a woman as beautiful as she could be found.

Damon sent messengers throughout his town and other lands to find woman of noble birth who resembled his wife and would be willing to marry him, but when none could be found, his evil advisors whispered sinful suggestions to marry his own daughter. So twisted were Damon's thoughts that he recognized only his wife when he looked upon Dymphna, and so he consented to the arrangement.

When she heard of her father's misguided plot, Dymphna fled her castle with her confessor, a priest named Gerebran, two trusted servants, and the king's fool. The group sailed toward what is now called Belgium, and hid in the town of Geel.

@Catholic.org