Alexander Vygantas was the duke of which city in Lithuania?
Kernavė Kernavė was a medieval capital of the Grand Duchy of Lithuania and today is a tourist attraction and an archeological site (population 318, 1999). It is located in the Širvintos district municipality located in southeast Lithuania. A Lithuanian state cultural reserve was established in Kernavė in 1989. In 2004 Kernavė Archaeological Site was included into UNESCO world heritage list.
David of Hrodna David (Belarusian: Давыд Гарадзенскі , Lithuanian: "Dovydas Gardiniškis" , killed in 1326) was a castellan of Hrodna and one of the most famous military commanders of Gediminas, Grand Duke of Lithuania. He might have been the son of Daumantas of Pskov and great grandson of Alexander Nevsky. Maciej Stryjkowski claims that David was married to one of the daughters of Gediminas. He seems to have been a middleman between the pagan Gediminas and the Christian princes of the Rurikid family and frequently led in battle the united Lithuanian-Ruthenian armies.