The Master Kuthumi , in the teachings of Theosophy is one of the "Masters of Wisdom" and in the Ascended Master Teachings is one of the Ascended Masters (also collectively called the Great White Brotherhood). He is regarded as a Master of the Second Ray (see Seven Rays). His name is also spelled as Koot Hoomi or Master K.H. and he is also known as a Mahatma. According to theosophical teachings, Koot Hoomi is considered to be one of the members of the Spiritual Hierarchy which oversees the development of the human race on this planet to higher levels of consciousness.
Alice Bailey also wrote that she had met Koot Hoomi. She said that on June 30th, 1895, he appeared to her as a turbaned man of non-European ethnicity dressed in a European-style suit.
According to later versions of Theosophy, Koot Hoomi is considered the Master of the "Second Ray of Wisdom" (See Seven Rays). Beginning January 1, 1956, Ascended Master Teachings organizations consider him to be the World Teacher (along with Jesus), having replaced Maitreya in that Office in Earth's Hierarchy.
It is believed by Theosophists that Koot Hoomi was previously incarnated as Pythagoras. In addition, according to The "I AM" Activity, The Bridge to Freedom, and The Summit Lighthouse, he was also incarnated as the following individuals:
The scholar K. Paul Johnson maintains that the "Masters" that Madame Blavatsky wrote about and produced letters from were actually idealizations of people who were her mentors. Johnson asserts that the "Master Kuthumi" was actually Thakar Singh Sandhanwalia, a member of the Singh Saba, an Indian independence movement organization and Sikh reform movement.
Some believe that Kuthumi is one of the wise men described and celebrated by William Butler Yeats in his poem "Anashuya And Vijaya."