Tulku Thongwa Döndän - (1416 - 1453)
The sixth Karmapa was born in Ngomtö Shakyam, near Karma Gön in eastern Tibet, to a family of devoted yogins.
Shortly after his birth, while his mother was carrying the young child, he suddenly became very excited when their path crossed that of Ngompa Chadral, a student of the fifth Karmapa.
Ngompa Chadral asked the name of the child, who smiled and replied "I'm the Karmapa." Ngompa Chadral cared for the infant for seven months and then took him to Karma Gön.
The young Thongwa Döndän immediately began to teach. Shamar Chöpäl Yeshe came to Karma Gön during this period to crown the Karmapa. Thongwa Döndän received teachings and Kagyüd transmission from Shamar Chöpäl Yeshe, Jamyang Drakpa, and Khenchen Nyephuwa.
In particular, he received the full lineage transmission from Ratnabhadra, who was his principal lineage teacher.
At a young age, he began to compose many tantric rituals, eventually establishing a body of liturgies for the Kamtsang lineage. He also joined the lineages of the Shangpa Kagyüd and the Shijay (Chöd - "cutting through egotism") into the main Kagyüd lineage transmissions.
He dedicated his activity to composition, teaching, restoring many monasteries within Tibet, printing books and strengthening the sangha. He began to develop the Shedra system, the monastic university, in the Karma Kagyüd lineage.
Realizing that he would die at an early age, he entered retreat, and conferred a regency on the First Gyaltsab, Goshir Paljor Döndrub, indicating where he would next take birth.
The sixth Karmapa's main spiritual heir was Bengar Jampal Zangpo, author of the "Mahamudra Lineage Supplication."This renowned prayer of the Kagyüd lineage represents his spontaneous utterance upon realizing Mahamudra.
Excerpt from the official website of The Tsurphu Labrang