Tsongkhapa (1357–1419), whose name means “The Man from Onion Valley”, was a famous teacher of Tibetan Buddhism whose activities led to the formation of the Geluk school. He is also known by his ordained name Lobsang Drakpa (blo bzang grags pa) or simply as Je Rinpoche (rje rin po che).

Tsongkhapa heard Buddha’s teachings from masters of all Tibetan Buddhist traditions, and received lineages transmitted in the major schools.

His main source of inspiration was the Kadampa tradition, the legacy of Atiśa. Based on Tsongkhapa’s teaching, the two distinguishing characteristics of the Gelug tradition are:

Born into a nomadic family in Amdo province in 1357, Tsongkhapa received the layman ordination (skt. Upasaka) at the age of three from the 4th Karmapa, Rolpe Dorje, and was entitled “Kunga Nyingpo” (kun dga’ snying po). At the age of seven he took the novice ordination (skt. Sramanera, tib. Getsul) from Choje Dhondup Rinchen (chos rje don ’grub rin chen) and was given the name “Lobsang Drakpa” (blo bzang grags pa). It was at this early age that he was able to receive the empowerments of Heruka Chakrasamvara, Hevajra, and Yamantaka, three of the most prominent wrathful deities of Tibetan Buddhism, as well as being able to recite a great many Sutras, not the least of which was Manjushri-nama-samgiti. He would go on to be a great student of the Buddhist Vinaya, the doctrine of behaviour, and even later of the Six Yogas of Naropa, the Kalachakra Tantra, and the acclaimed practice of Mahamudra. At the age of 24 Tsongkhapa received the ordination of a full monk (skt. Bhikshu, tib. Gelong) in the Sakya Tradition.

Tsem Tulku Rinpoche (born October 24, 1965) is a tulku, a reincarnate lama of the Gelug school of Tibetan Buddhism, and the founder and spiritual guide of the Kechara House Buddhist Association in Malaysia.

Tsem Tulku is the third in the line of tulkus associated with Ganden Monastery's Shartse college and the Gyuto tantric college. His predecessors were Gedun Nyedrak,^{[unreliable source?]} a Khampa who served as Ganden Shartse's 72nd abbot; and Kentrul Thubten Lamsang, from Drikung, who died in Phari during the 1950s. Since the former came from a family which owed ties of fealty to Tsem Monastery, which housed a tooth of Tsongkhapa as a holy relic (tsem being the honorific Tibetan word for "tooth"), the name "Tsem" came to be applied to the tulku lineage; hence Tsem Tulku's appellation. ("Rinpoche" is an honorific meaning "precious," which is customarily affixed to the names of lamas.)

Tsem Tulku was born in Taipei, Taiwan to Dewa Nimbo, an Old Torghut Mongolian woman whom Tsem Tulku describes as a "princess" (she was the grand-daughter of Prince Palta, a Xinjiang government official during the Qing and Nationalist periods; and the daughter of Mingyur Wang, briefly a member of the ROC National Assembly); and Lobsang Gyatso, a Tibetan from Ngawa with ties to the Tibetan exile government who, after fleeing to Taiwan, ran a school for Tibetan refugee children. According to Tsem Tulku's website,