The Annalista Saxo names (in order) "Bennonis ducis, qui et Bernhardus et Liudigeri comitis et Machtildis comitisse" as brothers and sister of "domna Suanehildis [filia] Herimanni ducis de Liuniburh", recording the names of Mechtild's two husbands[216]. The Chronicle of Alberic de Trois-Fontaines names "Mathildis comitissa Saxonie" as wife of "Godefridi Ardennensis"[217]. "Heinricus…Romanorum imperator augustus" confirmed the rights and property of Kloster Mouzon donated by (among others) "dux Fredericus pro anima Ottonis…[et] Godefridus comes et coniux sua Mathildis pro anima sui fratris Adalberonis archiepiscopi" by charter dated 1023[218]. The necrology of Liège Saint-Lambert records the death "VIII Kal Jun" of "Mathildis comitisse"[219]. from: http://fmg.ac/Projects/MedLands/LOTHARINGIAN%20(LOWER)%20NOBILITY.htm#_Toc127613407