Research Notes:

Thietmar refers to "Konrad" as son-in-law of Hermann Duke of Swabia, recording that they attacked Strasbourg together after the election of Heinrich II King of Germany in 1002. Wipo names "Mahthilda de filia Chuonradi regis Burgundiæ" as mother of "iunioris Chuononis". The Alberti Milioli Notarii Regini Liber de Temporibus names "comitissam Beatricam…de Gallia…filia comitis Frederic, mater…domina Matilda", but does not give the origin of Mathilde. The Annalista Saxo names "Machtildis" as sister of Gisela, wife of Emperor Konrad II, and also names her third husband. The primary source which records her second marriage has not so far been identified. However, the Chronicon Sancti Michælis, monasterii in pago Virdunensi names "duabus puellulis Sophia et Beatrice" as daughters of the son of "duce Theodorico", specifying that the empress was their amita and that she adopted them after their father died. She attended the Easter celebrations at Ingelheim in 1030.

The Liber Anniversariorum of Einsiedeln records the death in Jul of "Mechthild soror imperatricis Gislæ". "Chuonradus…Romanorum imperator augustus" donated property to the church of Worms naming "filii nostri Heinrici Regis, filie quoque nostre Beatricis" for the souls of "parentum nostrorum defunctorum atavi nostri ducis Chuonradi, avie nostre Iudithe, patris nostri Heinrici, patrui nostri ducis Chuonradi eiusque coniugis Mathildis, sororis etiam nostre Iudithe", all buried at Worms Cathedral, by charter dated 30 Jan 1034. ²