It is popular across a wider region of the Indian subcontinent.
In Shanxi, where Jin Chinese is spoken, unfilled buns are often called momo (饃饃), which is simply the character for "steamed bun". The name momo spread to Tibet, India and Nepal and usually now refers to filled buns or dumplings. Momo is the colloquial form of the Tibetan word "mog mog". The different names for the dumpling include Assamese: মম; Bengali: মোমো; Manipuri: ꯃꯣꯃꯣ; Nepali: मम; Nepal Bhasa: ममचा, मम:; Tibetan: མོག་མོག་, Wylie: mog mog; simplified Chinese: 馍馍; traditional Chinese: 饃饃; pinyin: mómo.
As for the Himalayan momo, the dish is believed to have spread from Tibet along with the influx of the Tibetan diaspora.