Robert I Count of Flanders the Frisian

✓ Robert I 'the Frisian', Count of Flanders ([1035]-13 Oct 1093), son of Baldwin V of Flanders by Adela of France (Genealogica Comitum Flandriae Bertiniana names 'Balduinum Haanoniensem, et Robdbertum ... et Matilde uxorem Guillelmi regis'), brother of Queen Matilda (I99587); m. Gertrude of Saxony, widow of Floris I of Holland; father of Gertrude, Duchess of Lorraine. RING into Flanders at Baldwin V (I99594), and Gertrude of Saxony (I100455) already an ancestor through her first marriage. Source: Medieval Lands (fmg.ac, Cawley), read 2 Nov 2026: 'Flanders, Hainaut'. [DIRECT ANCESTOR OF THE COMPILER: flag added 2 Nov 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]