Paul I of Russia
Paul I (; "Pavel Petrovich") ( – ) reigned as Emperor of Russia between 1796 and 1801. Officially, he was the only son of Peter III and Catherine the Great, though Catherine hinted that he was fathered by her lover Sergei Saltykov, who also had Romanov blood, being a descendant of the first Romanov tsar's sister, Tatiana Feodorovna Romanova.
Tadeusz Kościuszko
The death of Tsaritsa Catherine the Great on November 17, 1796, led to a change in Russia's policies toward Poland. On November 28, Tsar Paul I, who had hated Catherine, pardoned Kościuszko and set him free, after he had tendered an oath of loyalty. Paul promised to free all Polish political prisoners held in Russian prisons and forcibly settled in Siberia. The Tsar gave Kościuszko 12,000 rubles, which the Pole later, in 1798, attempted to return, when also renouncing the oath.