Probably from Tibetan མཛོ་པོ (mdzo po, “male offspring of a female cow and yak bull”), from Classical Tibetan མཛོ་པོ (mdzo po, from མཛོ (mdzo, “cow and yak hybrid”) + པོ (po, “suffix for males”)); or, from a similar Tibeto-Burman source, such as Tibetan ཟེ་བ (ze ba, “zebu or camel's hump”).