Johannes Gijsbert Willem Jacobus (Johan) Eilerts de Haan (born in Noordwolde, October 3, 1865 - died in the interior of Suriname, August 29, 1910) was a Dutch explorer and soldier.

Eilerts de Haan was educated at the Royal Naval Institute in Willemsoord, Den Helder.

Two years later, he wrote an article by Eilerts de Haan in the Journal of the Royal Dutch Geographical Society (KNAG) entitled "Report of the expedition to the Suriname River."

Kayser wrote about the trip in a 1912 article for the Society entitled "Report of the Corentyne expedition (19 July 1910-1 April 1911)."

G. Stahel wrote a book later about the expedition, "De expeditie naar het Wilhelmina-Gebergte (Suriname) in 1926".

[1] The grave was revisited in 2000 by descendant Herry Eilerts de Haan, in the company of, among others Michel Sinatra and Nico Pronk.