Cunigunda, countess of Trèves & Ardennes - Cunigonde's 3rd husband is unknown

Looking for evidence that Gilbert, duke of Lorraine is Cunigunda, countess of Trèves & Ardennes 's 3rd husband.

CUNIGONDE ([895]-after [930/40]). Her parentage and first marriage are indicated by the charter dated to [915] under which Charles III “le Simple” King of the West Franks donated the abbeys of Hastières and Saint-Rombaut to Liège Saint-Lambert, granting the enjoyment for life to "comes Windricus...uxoris eius...Cunegundis et unius filiorum ipsorum...nostri nepotis Adelberonis"[323]. Her first and second marriages are confirmed by the Vita Iohannis Gorziensis which names "episcopo…Adalberone" (her son by her first husband) and "vitrico…eius Richizone" (her second husband)[324]. Her parentage is confirmed more specifically because the mother of Siegfried Count of Luxembourg is named "Cynigund", daughter of "Irmindrud" daughter of Louis II "le Bègue" King of the West Franks, in an 11th century genealogy which traces the ancestry of Siegfried's daughter Empress Kunigund[325]. Her possible third marriage is discussed in the document LUXEMBOURG, SALM. m firstly ([907/09]%29 WIGERICH [III] Comte d’Ardenne, son of --- (-[19 Jan 916/919], bur Abbaye de Saint-Glossinde, Metz). m secondly ([916/19]) as his second wife, RICHWIN [Richizo] Comte [de Verdun], son of --- (-murdered 923). [m thirdly ---, son of ---.] https://fmg.ac/Projects/MedLands/CAROLINGIANS.htm#CunegundisM1Wigeric''

Removing, pending provision of primary sources