omi (1)youdaoicibaDictYouDict[omi 词源字典]
"In early imperial Japan: (a hereditary title for) the head of clan or family that claimed imperial ancestry, who usually also served as a high-ranking official in the Yamato court", Late 19th century; earliest use found in Transactions of the Asiatic Society of Japan. From Japanese omi clan chieftain (720 in Nihon-shoki, the Chronicles of Japan), fused compound of uncertain origin. Perhaps a contraction of ō-mi (from ō- great + -mi revered being, god (from (i)mi, nominalized stem of imu to shun)), but frequently apprehended as from ō- + mi body, person.[omi etymology, omi origin, 英语词源]
omi (2)youdaoicibaDictYouDict
"Originally among German communities: a grandmother", 1980s. From German Omi from Om- (in Oma) + -i, hypocoristic suffix.
OMI (3)youdaoicibaDictYouDict
"Oblate Fathers of Mary Immaculate", Early 20th century; earliest use found in The Catholic Encyclopaedia.