"Friderici, Gisilberti, Sigeberti fratrum predicti Gozlini" subscribed the charter dated 943 which refers to "Gozlines…miles…ex nobilissimis regni Chlotarii ducens prosapia" and the donation by "uxor eius Uda et filius eius…Regingerus" to St Maximin at Trier[20]. As Frederic is known to have been the brother of Adalbéron Bishop of Metz, whose parents are known (see above), it is assumed that all five individuals were sons of Wigeric and Cunegondis. from: http://fmg.ac/Projects/MedLands/LOTHARINGIAN%20(LOWER)%20NOBILITY.htm#_Toc127613407