False Dmitry III
False Dmitry III (Russian: Лжедмитрий III, romanized: Lzhedmitrii III; died July 1612), historically known as Pseudo-Demetrius III, was the last and most enigmatic of three pretenders to the Russian throne who claimed to be the youngest son of Ivan the Terrible; Tsarevich Dmitry. == Biography == Supposed to have been a deacon called Sidorka, he appeared suddenly, from behind the river Narva, in the Ingrian town of Ivangorod, proclaiming himself the Tsarevich Dmitry Ivanovich, on March 28, 1611.