When did the cousin of the Grand Duke of Lithuania die?
Vytautas Vytautas (c. 1350 – October 27, 1430), also known as Vytautas the Great (Lithuanian: "   ", Belarusian: "Вітаўт Кейстутавіч (Vitaŭt Kiejstutavič)" , Polish: "Witold Kiejstutowicz" , Rusyn: "Vitovt", Latin: "Alexander Vitoldus") from the 15th century onwards, was a ruler of the Grand Duchy of Lithuania, which chiefly encompassed the Lithuanians and Ruthenians. He was also the Prince of Hrodna (1370–1382), Prince of Lutsk (1387~1389), and the postulated king of the Hussites.
Michał Kazimierz Pac Michał Kazimierz Pac (Lithuanian: "Mykolas Kazimieras Pacas" ; 1624 – 4 April 1682 in Wace near Vilnius) of the Gozdawa Coat of Arms, was a nobleman of the Grand Duchy of Lithuania and a member of the Pac family. He was a son of Stefan Pac and a brother of Krzysztof Zygmunt Pac, the Chancellor of Lithuania.