Yakov Fyodorovich Dolgorukov

Prince Yakov Fyodorovich Dolgorukov (Jacob Dolgoruky) (1639–1720) was a Russian senator, statesman, soldier and diplomat. He was a close associate of Peter the Great who was known for his forthright criticism and advice to the Tsar. He frequently but respectfully challenged the Tsar when serving at court. However, he was an early supporter of the Tsar's attempts to reform and modernise Russia.