Otto von Etzel (1860 - 1934) was a German soldier and diplomat.
In 1902–1908, he was German military attache in Washington, D.C.[1]
On 25 November 1912 he married Margarete Friederike Ulrike Elise Mitzlaff (born 21 July 1878 in Berlin; died 25 March 1965 in Berlin). They had two sons, Joachim Franz Otto (born 24 August 1914 in Erfurt; died 23 February 1949 in Golubowka (Charkow), Ukraine) and Herbert Franz Hermann (born 3 December 1919 in Erfurt; died 26 February 2004 in Berlin).