Celadet Bedir Khan or Celadet Bedirkhan (Kurdish: Celadet Alî Bedirxan?; 26 April 1893 – 1951), also known as Mîr Celadet, was a Kurdish diplomat, writer, linguist, journalist and political activist.
He held a master's degree in law from Istanbul University, completed his studies in Munich, and spoke several languages including Arabic, Kurdish, Russian, German, Turkish, Persian and French.
He left Turkey in 1923 when the Kemalists declared a new republic.
In 1927, at a conference of Kurdish nationalists held in Beirut, a committee was formed, the Xoybûn.
He is known for having been the first modern linguist to compile and organise the grammar of the modern form of the Northern Kurdish language, Kurmanji, and having designed the Latin-based Hawar alphabet, which is now the formal alphabet of Kurmanji and is also frequently used for the other dialects of the Kurdish Language, having replaced the Arabic-based, Cyrillic-based, Persian-based and Armenian-based alphabets formerly used for Kurmanji.