Lex Hixon (1941–1995; born Alexander Paul Hixon, also known as Nur al-Anwar al-Jerrahi) was an accomplished author, poet, and spiritual teacher. He practiced and held membership in several of the world's major great religious traditions, and documented his spiritual explorations in nine books and many articles and teachings given to various groups. His conviction that all of the great religions are true found expression in his works; this idea was sparked by his study of the life and teachings of Sri Ramakrishna, who gave these radical teachings in 19th century Calcutta. It became a passionate conviction for Hixon, and he made his life a witness to this belief by fully immersing himself in multiple religious practices and studies. This was not a research project but an act of faith.

Hixon was born in Pasadena, California on December 25, 1941, one of three sons of Alexander and Adelaide Hixon. He married his second wife Sheila in 1965; they had two daughters and one son. Shanti, India and Dylan (Hixon also had a daughter from a previous marriage). He graduated from Yale University, where he majored in philosophy, and received a PhD in Comparative Religion from Columbia University in 1976.

Chinmoy Kumar Ghose, also known as Sri Chinmoy (August 27, 1931 – October 11, 2007) was an Indian spiritual teacher, poet, artist and athlete who immigrated to the U.S. in 1964., the founder of the religious organization "Sri Chinmoy Centre Church, Inc." better known as "Sri Chinmoy Centre". According to his followers, Sri Chinmoy wrote 1,500 books, 115,000 poems and 20,000 songs, created 200,000 paintings and gave almost 800 free peace concerts in notable venues around the world. As a spiritual Master, he advocated meditation, chanting mantras and prayers, performing dedicated service to God as a way to personal enlightenment, or God-realisation as described by Eastern religions, including Sri Aurobindo's spiritual teaching.

Chinmoy was the youngest of seven children, born in Shakpura village in the Chittagong District of East Bengal (now Bangladesh). He lost his father to illness in 1943, and his mother a few months later. In 1944, the 12-year-old Chinmoy joined his brothers and sisters at the Sri Aurobindo Ashram in Pondicherry, French India, where elder brothers Hriday and Chitta had already established a presence.

Muhammad Hisham Kabbani (born 13 Safar 1364 / 28 January 1945) is a prominent Lebanese-American Sufi Muslim. Kabbani advocates an understanding of Islam described by his supporters as fundamentally based on peace, tolerance, respect and love. Kabbani has been an outspoken critic of extremism as well as the Wahabi doctrine. Shaykh Kabbani is a spiritual teacher in the line of the Naqshbandi-Haqqani Sufi Order. He is chairman of the Islamic Supreme Council of America and the Sufi Muslim Council.

Shaykh Muhammad Hisham Kabbani descends from a long line of scholars, and was born in Beirut, Lebanon. For more than 50 years he has been a disciple of Nazim al-Qubrusi and his representative in United States.

On the order of al-Qubrusi, Kabbani relocated to the United States in 1991, where he has opened 13 Sufi outreach centers focused on spreading Sufism. He has lectured at many universities, including the University of Chicago, Columbia University and the University of California, Berkeley, as well as at many spiritual and religious centers throughout North America, Europe, the Far East, and the Middle East.

Hristo Kyuchukov is a leading specialist in the field of Romani psycholinguistics and education of Roma children in Europe. He holds a Ph. D. in psycholinguistics from the University of Amsterdam, the Netherlands (1995); Ph. D. in Education form the University of Sofia, Bulgaria (1998) and third Ph. D. (DrSc) in Education again form the University of Sofia, Bulgaria (2002). Prof. Dr. Hristo Kyuchukov introduced the Romani language education in Bulgaria to primary and secondary school children at the beginning of 1990's, and he also introduced new University programs connected to Romani language education at University level in Bulgaria (University of Veliko Tarnovo, from 2003) and in Slovakia (Constantine the Philosopher University in Nitra, 2008). In 2011 Hristo Kyuchukov introduced a new subject in the M.A. Program of the Institute of Turkology at the Free University of Berlin, Germany: "Turkish Dialects spoken by Muslim Roma in Balkan countries". He is an author of number of scientific publications regarding Romani, Turkish, Bulgarian and Russian in contact; acquisition of Romani and Turkish; education of Roma children in Europe. He is also an author of children's books: "A history of the Romani People" (2005) written in co-authorship with Ian Hancock published by Boyds Mills Press and "My name was Hussein" (2004) published by Boyds Mills Press. Hristo Kyuchukov is a Professor in Romani language and culture at the Constantine the Philosopher University in Nitra, Slovakia and recently he started to teach at the Institute of Turkology at Free University of Berlin, Germany. Prof. Dr. Hristo Kyuchukov is an editor of the "International Journal of Romani Language and Culture" and co-editor with Prof. Dr. Ad Backus of the "International Journal of Psycholinguistics and Sociolinguistics", published by Lincom Publishers in Germany. He was also "proposed for Vice-Minister on Roma Educational Integration at the Bulgarian Ministry of Education and Science"