Boris Kurakin

Prince Boris Ivanovich Kurakin (Russian: Князь Борис Иванович Куракин; 30 July 1676, Moscow – 28 October 1727, Paris) was the third permanent Russian ambassador abroad, succeeding Andrey Matveyev in The Hague and one of the closest associates of Peter the Great. He was also the tsar's brother-in-law, being married to Xenia, daughter of Feodor Abramovich Lopukhin and sister of Eudoxia Lopukhina.