Of what relation is Irina Mikhailovna Raievskya to the great-great grandson and historic heir of Wilhelm II?
Irina Mikhailovna Raievskya Irina Mikhailovna Raievskya (18 August 1892 - 22 January 1955), (Russian: Раевская, Ирина Михайловна ), was Duchess of Mecklenburg, her second husband George, Duke of Mecklenburg (German: "Georg Herzog zu Mecklenburg" ) was the head of the House of Mecklenburg-Strelitz from 1934 until his death 1963. Irina is the great-grandmother of Sophie, Princess of Prussia, wife of Georg Friedrich, Prince of Prussia current head of the House of Hohenzollern.
Tsarevich Alexei Alexeyevich of Russia Tsarevich Alexei Alexeyevich (Russian: Алексей Алексеевич , "Aleksey Alekseyevich"; 15 February 1654 - 17 January 1670) was the second son and heir of Tsar Alexis of Russia and Maria Miloslavskaya, brother of Tsar Feodor III, Tsar Ivan V, and Tsarevna Sophia and half-brother of Tsar Peter the Great. He died at fifteen before he had a chance to succeed to the throne.