Anton Willem Nieuwenhuis

Anton Willem Nieuwenhuis (22 May 1864 – 21 September 1953) was a Dutch explorer and physician who travelled extensively in central Borneo in the 1890s, recording valuable ethnographic information about the Dayak people and making biological collections.

That year, he joined the armed forces to become a medical officer in the Royal Dutch East Indies Army, stationed in 1892 at Sambas, West Kalimantan.

He participated in three major expeditions to parts of Borneo not then under Dutch control, the first of which took place under the leadership of Gustaaf Adolf Frederik Molengraaff in 1893–1894.

He then became the first European to cross Borneo from west to east (or vice versa), from Pontianak to Samarinda, in 1896–1897.

In 1904, Nieuwenhuis was appointed professor of geography and ethnology at Leiden University and became the editor of the journal Internationales Archiv für Ethnographie.