Reichswald Forest War Cemetery, Grunewaldstr., 47533 Kleve (Rhein), Germania
Reinhard Samuel Christian van Haeften (May 19, 1772 – January 20, 1803) was born at Schloss Erprath, Xanten, Düsseldorf, North Rhine-Westphalia, Germany, on May 19, 1772. He died on January 20, 1803 in Goch, Düsseldorf, North Rhine-Westphalia, Germany.
He was the son of Baron Karl Franz Werner van Haeften and Sara Christiane Friederike von Haeften (Wedzik von Widowsky). He married Christina von Crammon and was the father of Baron Friedrich Gustav Alexander von Haeften and Christiana Jeanette Frederika Emma van Haeften.
At 25 Alexander von Humboldt met Reinhardt von Haeften, at the time a 21-year-old lieutenant, with whom he lived and travelled for two years, and to whom he wrote in 1794: "I only live through you, my good precious Reinhardt." When von Haeften became engaged, Humboldt begged to remain living with him and his wife: "Even if you must refuse me, treat me coldly with disdain, I should still want to be with you...the love I have for you is not just friendship or brotherly love, it is veneration."