The bodhisattva who embodies the compassion of all buddhas. His six syllable mantra is OM MA NI PAD ME HUM (OM MANI PEME HUNG). SO he is sometimes called Sadaksari, the "six syllable Avalokiteshvara." Chenrezik is the patron deity of Tibet. Both His Holiness Karmapa and His Holiness Dalai Lama are manifestations of Chenrezik.

Tibetan: spyan ras gzigs phyag bzhi pa
Sanskrit: catur bhuja avalokiteshvara

Other forms are:
Eleven-headed, eight arms, Sanskrit Ekadashamukha Avalokiteshvara
Eleven-headed, 1000 arms, Sanskrit Ekadashamukha Sahasrabhuja Avalokiteshvara