Irmina of Oeren (also called Ermina and Hirmina; died 720) was a saint, founder and abbess of a convent in Oeren, near Trier (Trèves), and co-founder of a convent in Echternach (now eastern Luxembourg). Hagiographer Basil Watkins states that Irmina's 12th century biography is "unreliable" and it is likely that "legends about her family tree spiralled out of control", but she came from one of the most powerful families in the Merovingian kingdom. She might have been Saint Primina, the daughter of Dagobert I and sister of Saint Modesta. She might have been the daughter of Dagobert II and sister of Saint Adela of Pfalze. Historian Ian Wood stated that Irmina is "traditionally, and probably correctly, identified as Plectrude's mother".
According to many versions of Irmina's biography, when she was fifteen years old, she was engaged to marry a man named Count Hermann, but just before they were to marry, he was killed in a murder-suicide by one of his servants, who "admired Irmina and could not bear that his master should have her".
Irmina then married Hugobert, a magnate from the middle Moselle region, who served as seneschal and was a count of the palace at the Merovingian court during the reigns of Theuderic III and Childebert III. They had several daughters, including:
Plectrude, 691/717 wife of Pippin of Herstal and founder of the Abbey St. Maria im Kapitol in Cologne
Adela (655-732), abbess of Pfalzel, married to Eudes I, Duke of Aquitaine (questionable Odo the Great and son of Saint Oda)
Regintrud, whose second marriage after the death of her husband was to the duke Theudebert of Bavaria
Irmina (d. ca 704), married to Chariveus, brother of Lambert, Count of Hesbaye.
Bertrada of Prüm (b. c. 670, d. after 721), the founder of the Prüm Abbey and mother of count Caribert of Laon, who was father of Bertrada of Laon, who in turn was mother of Charlemagne.