Ottó Komoly (also known as Nathan Zeev Kohn) (26 March 1892 – 1 January 1945) was a Hungarian Jewish engineer, officer, Zionist, and humanitarian leader in Hungary.

He was called a pacifier and unifier by nature[3] by Randolph Braham who did everything possible to put an end to the perennial conflicts within and among the various Zionist groups and organizations..

After the war, his military honors gave him credibility and a high status in Hungarian society, in spite of wide spread antisemitism in the country described in History of the Jews in Hungary.

His family was considering emigration to Palestine in 1939, but he decided to stay in Hungary to help local Jews escape persecution by using his status and influence.

[5] He also spent a substantial amount of time in 1943-44 in creating a Memorandum[6] (four versions are also preserved in Yad Vashem's collection)[7] aimed at persuading the Hungarian government to alter its anti-Jewish policies.

Together with Rudolf Kasztner he led the Aid and Rescue Committee, which provided assistance[9] to Jews fleeing persecution in Poland and Slovakia.

With the help of the embassies of Switzerland and other neutral countries, the Red Cross created 52 refuges, where about 5500 children and the 500 volunteers were ultimately saved from deportation and possible extermination.

In conjunction with groups of young Zionists,[16] he also provided food and medication for Jewish hospitals, old age homes and the Budapest ghetto.