Vitaly Naumkin, Ph.D. (1972), Dr. Sc. (1981) is the president of the Institute of Oriental Studies of the Russian Academy of Sciences. He has published books and articles on the Arab and Islamic world in ancient and modern times. He is a fieldwork researcher on Soqotra since 1974. Leonid Kogan, Ph.D. (2001), is head of the Ancient Near Eastern department of the Institute for Oriental and Classical studies, Russian State University for the Humanities, and the vice-director of the Insitute for Oriental and Classical Studies, National Research University–Higher School of Economics. His publications deal with comparative Semitic grammar and etymology. He is fieldwork researcher on Soqotra since 2010. Isa Guman Aldarhi, is a primary school teacher in his native tribal area Darho. Ahmed Isa Aldarhi, has a bachelor in English from the Soqotra branch of the University of Hadramawt. Maysoon Mohammed Aldarhi, is a graduate student of Islamic sciences at the Soqotra branch of the University of Hadramawt. Maria Bulakh, Ph.D. (2005), is a lecturer in Ethiopian languages at the Institute for Oriental and Classical studies, Russian State University for the Humanities and the Insitute for Oriental and Classical Studies, National Research University–Higher School of Economics. She has published numerous articles on grammar and lexicon of Geez, modern Ethiopian languages and Semitic in general. She is field researcher on Soqotra since 2017. Dmitry Cherkashin is a lecturer in Classical Arabic at the Institute for Oriental and Classical Studies, National Research University–Higher School of Economics. He is a fieldwork researcher on Soqotra since 2010. Ekaterina Vizirova is a lecturer in Ancient Near Eastern languages at the Institute for Oriental and Classical Studies, National Research University–Higher School of Economics. She is a fieldwork researcher on Soqotra since 2012.