Ilya Perfilyev (Perfiryev) () (1583-1659), was a Russian explorer, polar seafarer and a founder of Verkhoyansk. In the summer of 1633 he headed a group, consisted of merchant-and-industrial people and Yenisey and Tobolsk Cossacks. In 1634 he discovered the Yana River and the Yana-Indigirka Lowland. References Slovari.yandex.ru Perfilyev biography Cossack explorers Explorers of Siberia Year of death missing 17th-century Russian people Year of birth unknown