Question: Aleksander Chodkiewicz, was a noble from the Grand Duchy of Lithuania, founder of the Supraśl Orthodox Monastery, via his mother Jawnuta (Agnieszka) of the Belsky family, he was second cousin to which member of the Jagiellon dynasty, reigned as King of Poland and also as the Grand Duke of Lithuania from 1506 until 1548?
Sentence (from "Sigismund I the Old"): Sigismund I of Poland (Polish: "Zygmunt I Stary" , Lithuanian: "Žygimantas I Senasis" ; 1 January 1467 – 1 April 1548), of the Jagiellon dynasty, reigned as King of Poland and also as the Grand Duke of Lithuania from 1506 until 1548.
Relevant evidence: Yes