Grand Duke Michael Alexandrovich of Russia
Grand Duke Michael Alexandrovich of Russia was the youngest son and fifth child of Emperor Alexander III of Russia and youngest brother of Nicolas II.
The birth of Nicholass son Alexei in 1904 temporarily moved Michael back to secondinline, but Alexei inherited the bloodclotting disorder haemophilia and was not expected to live. Michael caused a commotion at the imperial court when he took Natalia Sergeyevna Wulfert, a married woman, as a lover. Nicholas sent Michael to Orel, to avoid scandal, but this did not stop Michael, who travelled frequently to see his mistress. After the couples only child, George, was born in 1910, Michael brought Natalia to St. Petersburg, where she was shunned by society. In 1912, Michael shocked Nicholas by marrying Natalia, in the hope that he would be removed from the line of succession. Michael and Natalia left Russia to exile abroad in France, Switzerland and England.
Source: Wikipedia