Last name Onosai (Onosai 
) , around the globe, is a rare cognomen. The last name Onosai is characteristic of Hungary, where it is a rare surname, Japan, and New Zealand. In absolute terms, it is commonest in Japan, Hungary, and the United States. Very seldom, Onosai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onosai | Japan, Australia, New Zealand, United States, Hungary |
| joe onosai Samoan strongman and American football player (born 1965), US (b. 1965) |
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| onosai tololima-auva'a New Zealand rugby union player, NZ (b. 1985) |
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