In 1580, the Tsar chose Boris Godunov's sister Irina Godunova (1557 – 26 October/23 November 1603) to be the wife of his second son and eventual heir, the fourteen-year-old Feodor Ivanovich (1557–1598). On this occasion, Godunov was promoted to the rank of "Boyar". On 15 November 1581, Godunov was present when the Tsar murdered his own eldest son, the crown prince Ivan. Godunov tried to intervene but received blows from the Tsar's sceptre. The elder Ivan immediately repented, and Godunov rushed to get help for the Tsarevich, who died four days later.