Otto Neumann Knoph Sverdrup (31 October 1854, in Bindal, Helgeland – 26 November 1930) was a Norwegian sailor and Arctic explorer. Early and personal life He was born in Bindal as a son of farmer Ulrik Frederik Suhm Sverdrup (1833–1914) and his wife Petra Neumann Knoph (1831–1885). He was a great-grandnephew of Georg Sverdrup and Jacob Liv Borch Sverdrup, first cousin twice removed of Harald Ulrik and Johan Sverdrup, second cousin once removed of Jakob, Georg and Edvard Sverdrup, third cousin of Georg Johan, Jakob, Mimi, Leif and Harald Ulrik Sverdrup. He was a brother-in-law of Johan Vaaler, and Otto himself married his own first cousin, Gretha Andrea Engelschiøn (1866–1937), in October 1891 in Kristiania. Their daughter Audhild Sverdrup (1893–1932) married Carl Johan Sverdrup Marstrander. His father was born on Buøy in Kolvereid municipality. As oldest son Otto was heir to the Sverdrup properties at Buøy. However, he left it all to his younger brothers and went to Åbygda in Bindal, to the farm named Hårstad, where Otto Sverdrup was born. In 1872, at the age of 17, Otto Sverdrup returned to Nærøy, to Ottersøy where his uncle Søren worked in transportation with his own vessels. Here Sverdrup started his career as a seaman and after a while he was sailing abroad. In 1875, he passed his mate's examination, and some years later the shipmaster's examination. In 1877 Sverdrup's parents moved from Bindal to the farm Trana outside Steinkjer. At this time O. T. Olsen, a teacher and employee in the bank at Kolvereid and a relative of his mother, had purchased the steamboat TRIO. Sverdrup was employed as captain. Around this time Sverdrup also met the lawyer Alexander Nansen who lived in Namsos. He was the brother of Fridtjof Nansen and through him Sverdrup and Fridtjof Nansen learned to know each other. Career and expeditions Sverdrup joined Fridtjof Nansen's expedition of 1888 across Greenland. In 1892 he was an advisor to Fridtjof Nansen when the ship Fram was built. In 1893 Sverdrup was given command of the ship, and in 1895 he was left in charge of it while Nansen attempted to reach the North Pole. Sverdrup managed to free the ship from the ice near Svalbard in August 1896 and sailed to Skjervøy, arriving just 4 days after Nansen had reached Norway. In the summer of 1897 Sverdrup worked as the shipmaster of Lofoten, a passenger ship to