Vladimir Olgerdovich was a son of which ruler of medieval Lithuania?
Algirdas Algirdas (Belarusian: Альгерд , Russian: Ольгерд , Polish: "Olgierd" ;  1296  – May 1377) was a ruler of medieval Lithuania. He ruled the Lithuanians and Ruthenians from 1345 to 1377. With the help of his brother Kęstutis (who defended the western border of the Duchy) he created an empire stretching from the present Baltic states to the Black Sea and to within fifty miles of Moscow.
Iron Wolf (character) The Iron Wolf (Lithuanian: "Geležinis Vilkas" ) is a mythical character from a medieval legend of the founding of Vilnius, the capital city of the old Grand Duchy of Lithuania and modern Republic of Lithuania. First found in the Lithuanian Chronicles, the legend shares certain similarities with the Capitoline Wolf and possibly reflected Lithuanian desire to showcase their legendary origins from the Roman Empire (see the Palemonids). The legend became popular during the era of Romantic nationalism. Today Iron Wolf is one of the symbols of Vilnius and is used by sports teams, Lithuanian military, scouting organizations, and others.