Jan Abramowicz

Jan Abramowicz (Lithuanian: Jonas Abramavičius; died 19 June 1602) was a nobleman in the Grand Duchy of Lithuania and one of the leaders of Calvinism in the country.

[1][2][3] Little is known about his early life, besides that he was brought up to the court of Mikołaj "the Red" Radziwiłł, then the Grand Hetman of Lithuania.

His ancestry is unknown, but he is associated with nobility and the influential magnate family of the Radziwiłłs, which could have helped him gain higher positions.

In 1585, he supported the Livonian lands joining the Grand Duchy of Lithuania instead of them being a dominion of the Polish crown.

Around this time Abramowicz was involved in various religious dealings like disputes between the Jesuits and the Calvinists in Lithuania, becoming the leader of the latter.