Marriage year 644 instead of 745?

Adèle de Trèves, Abbess of Pfalzel. She was not a daughter of King Dagobert. The primary source that names her as a daughter of Bodilon and Sigarde is unknown.

Catholic Encyclopedia says about her grandson, St. Gregory of Utrecht, "Gregory was born of a noble family at Trier. His father Alberic was the son of Addula, who, as widow, was Abbess of Pfalzel (Palatiolum) near Trier. On account of the similarity of names, and in consequence of a forged last will, Addula has been frequently confounded with Adala (Adela), daughter of Dagobert II of Austrasia--thus falsely making Gregory a scion of the royal house of the Merovingians." "St. Gregory of Utrecht" in Catholic Encyclopedia.

According to online sources, she was a daughter of Bodilon and Sigarde:

• http://freepages.genealogy.rootsweb.com/~havens5/p34693.htm
• http://www.celtic-casimir.com/webtree/3/26935.htm