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.
Grand Duke Michael Nikolaevich of Russia
He served 20 years (1862–1882) as the Governor General of Caucasia, being seated in Tbilisi, the town which most of his children remembered as the home of their childhood. In the course of his life, four members of his family ruled as Emperors of Russia: his father, Nicholas I; his brother, Alexander II; his nephew, Alexander III; as well as his grand-nephew, Nicholas II, whose second daughter, Grand Duchess Tatiana, the Grand Duke was godfather to. He died in Cannes, France, on 18 December 1909. He was the last surviving legitimate grandchild of Paul I of Russia.