Fedor Ivanovich Sheremetev (ca. 1570-1650) served as the de facto head of government from 1613-18 and again from 1642-46, both time during the reign of Tsar Michael. Sheremetev descended from the same old Moscow line as the Romanovs. In 1605 he was made a boyar by False Dmitry I. In 1610, he became one of the so called Seven Boyars - a self-appointed provisional government.