Frederick II Duke of Upper Lotharingia

✓ Frederick II, Duke of Upper Lotharingia (co-duke from c.1019, d. c.1026/27), son of Duke Thierry I and Richilde (Gesta Episcoporum Virdunensium: 'filius huius Theoderici fuit iunior Fredericus, qui mortuus est ante patrem suum'); b. [997/99], d. 17/18 May 1026; m. Mathilde of Swabia; father of Frederick III and of the heiresses Sophie (Bar) and Beatrice (Tuscany). His parents wired 22 Oct 2026. Source: Medieval Lands (fmg.ac, Cawley), 'Bar'. [DIRECT ANCESTOR OF THE COMPILER: flag added 22 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]