Dulduityn Danzanravjaa (1803–1856, Mongolian: Дулдуйтын Данзанравжаа) was a prominent Mongolian writer, composer, painter and physician and was the Fifth Noyon Khutagt, the Lama of the Gobi. His name is a Mongolian adaptation of the last part of the Tibetan name Lobsang Tenzin Rabgye given to Danzan Ravjaa by the 4th Bogd Gegeen, on his visit to the Mongolian capitol, Urga (present-day Ulaanbaatar) in 1812 where Danzanravjaa was also recognized as an Incarnate Lama (Tib: Tulku). There are several versions concerning the origins and use of "Dulduityn". He was the 5th incarnation of the Gobi Noyon Hutagt, which is the title of a prominent line of tulkus of the Nyingmapa lineage of Tibetan Buddhism in Mongolia and was found by the personal attendant of the 4th Noyon Hutagt in 1809. It was not possible to enthrone Danzan Ravjaa as the 5th Noyon Hutagt because of the ban from the ruling Manchu (Qing) Dynasty on recognition of this line of incarnations. Mongolia at the time was under Manchurian Qing control. He was enthroned as the Avshaa Gegeen in Ongiin Gol (present-day Saikhan-Ovoo) Monastery by Ishdonilhudev Rinpoche. He is primarily famous for his poetry, but is also known for his prophecies, and treatises on medicine, philosophy, and astrology.
Danzanravjaa was born in the Tüsheet Khan aimag's Gobi Mergen khoshuu, in what is today Khövsgöl sum of Dornogovi aimag. His family was poor and his mother died while he was still young. He and his father survived by begging and singing until 1809, when he was accepted as a disciple of Ishdoniilkhundev at Onggiyin Ghool Monastery, where was quickly acknowledged for his literary talent. The monasteries he established at Galbyn Uul became religious centers and served as religious crossroads between Mongolia, China, and Tibet during his lifetime. Other than his writings, he was also known for his syncretic combination of Yellow Hat and Red Hat sect beliefs.