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.
Feodor Kuzmich
It is suspected that Alexander I would have faked his death due to feelings of guilt about his father Paul I's death, and he faked his death to abdicate his throne and seek forgiveness for allowing his father to be killed. Prominent visitors include Innocent of Alaska, Father Peter Popov, and Bishop Athanasius of Irkutsk. In addition, Kuzmich is reported to have known French and spoke about life in Saint Petersburg and Moscow, as well as speaking about prominent people as if they were his friends.
Kuzmich discussed in detail Metropolitan Philarate, as well as intimate details about the war of 1812. By this time, there were many rumors that Kuzmich was in fact Alexander I. On his deathbed, the priest reportedly asked him if he was in fact the Alexander the Blessed. In response, Kuzmich said, "Your works are wonderful, Lord ... There is no secret, which is not opened."