Most often a transliteration variant of 毕摩, the Yi-people priest-shaman class - keepers of the Yi script and ritual texts of southern Sichuan and Yunnan. As a generic foreign-name rendering it can also stand in for Western surnames like 'Bumo' or 'Bumeau'.
memory
布 ('cloth') + 莫 ('do not') as transliteration syllables - neither character's lexical meaning matters here; they are chosen purely for sound.
