Vasili Pronchishchev

Vasili Vasilyevich Pronchishchev was a Russian explorer.In 1718, Vasili Pronchishchev graduated from Moscow School of Mathematics and Navigation and was promoted to naval cadet. In 1733, he was promoted to the rank of lieutenant and appointed head of one of the units of the Second Kamchatka Expedition, the purpose of which was to map the shores of the Arctic Ocean from the mouth of the Lena to the mouth of the Yenisey.

In 1735, Vasili Pronchishchev went down the Lena River on his sloop Yakutsk, doubled its delta, and stopped for wintering at the mouth of the Olenek River. Many members of the crew fell ill and died, mainly owing to scurvy. Despite the difficulties, in 1736, he reached the eastern shore of the Taymyr Peninsula and went north along its coastline. Finally Pronchishchev and his wife Maria succumbed to scurvy and died on the way back.

Source: Wikipedia