Ignacy Hryniewiecki was born in 1856.

Witold Hryniewiecki has written:

'My z Zamojszczyzny'

Ignacy Hryniewiecki died on 1881-03-13.

Jerzy Rogulski has: Performed in "Kaprysy Lazarza" in 1973. Performed in "Opetanie" in 1973. Played Sfinks in "Opadly liscie z drzew" in 1975. Performed in "Polskie drogi" in 1976. Played Student in "Barwy ochronne" in 1977. Played Ignacy Hryniewiecki in "Bialy mazur" in 1979. Performed in "Droga" in 1981. Played Uncle Karl in "Lace" in 1984. Played Gromyko in "Yalta" in 1984. Played Soviet Army Colonel in "The Great Escape II: The Untold Story" in 1988. Performed in "Wherever You Are..." in 1988. Played Straznik w bloku smierci in "Kornblumenblau" in 1989. Performed in "Counterstrike" in 1990. Performed in "Les enfants du vent" in 1991. Played Vice President in "Highlander" in 1992. Performed in "La sentinelle" in 1992. Played Schmidt in "Runaway Bay" in 1992. Played Jerzy in "Adventure Inc." in 2002. Performed in "Sotto falso nome" in 2004. Played Le professeur Bruner in "Le concile de pierre" in 2006.

Vladimir Lenin ordered a detail of the Cheka, Lenin's secret police, under Commandant Yakov Yurovsky murder Tsar Nicholas II and his entire family in the early morning hours of July 17, 1918. This was done during the Russian Civil War in order to stamp out any hope of restoring the Tsar to the throne that the forces opposing the Bolshevik takeover of the government had.

One can find a short first hand account of the incident written by one of the soldiers, Pavel Medvedev, in the book "Eyewitness to History'" (copyright 1987 John Carey, published by Faber and Faber Unlimited in 1987) edited by John Carey.

I assume this question refers to Tsar Nicholas II, although several czars had been assassinated throughout history (Peter the III and Alexander II come to mind)

For example, Tsar Peter III was assassinated by a conspiracy of people who wanted the weak Tsar deposed so that the future Catherine the Great could assume power.