[1] Helen was born in Denmark, the daughter of King Sverker II and Queen Benedicta.
Helen Sverkersdotter, the only daughter of the deposed king, was educated at Vreta Abbey at the time of her father's death.
Her relatives disapproved of the proposal of Sune Folkason, the son of an earl who had been among Sverker's opponents in the battle in which he fell.
In 1243, her daughter, Catherine Sunesdotter (c. 1215 – 1252), was married to King Eric XI, thus finally uniting the two Swedish dynasties.
Around 1244, Benedikte Sunadotter, the younger daughter of Sune Folkason and Helena Sverkersdotter, was abducted by Laurens Pedersson, Justiciar of Östergötland while she was being educated at the Vreta convent.