The Ram clan is one of the eighteen tribes (tsho) of the Sino-Tibetan frontier. These are all sub-clans of the primary Go (sgo) clan, known also as the heavenly lineage of Go, which is considered one of the original Tibetan ancestral clans. Nyima Gyeltsen, the ninth abbot of Narthang monastery, was born into this clan in Puteng Karma Kari in Tsang, not far from the monastery, in 1225.