Last name Morinaga (Morinaga 
, 森永 , Моринага 
) , around the world, is quite a rare cognomen. The last name Morinaga is characteristic of Singapore, where it is a rare surname, Japan, and Romania. Not in comparison with a country's population, the name is most common in Japan, Brazil, and the United States. More frequently, Morinaga is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Morinaga | Brazil, Japan, Indonesia, United States, China |
| 森永 | China |
| Моринага | Russia |
| yukio morinaga Japanese-American photographer, JP (b. 1888) |
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| sérgio massanori morinaga Brazilian politician, BR (b. 1948) |
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| tsutomu morinaga botanist |
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| masahiro morinaga Japanese particle physicist |
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| kana morinaga researcher |
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| kentaro morinaga researcher |
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| hisatoyo morinaga researcher (ORCID 0000-0002-0350-4728) |
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| tatsuo morinaga researcher |
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| luciana tamie kato morinaga researcher |
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| yoshitomo morinaga researcher (ORCID 0000-0002-3827-6411) |
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| takatoshi morinaga researcher |
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| gen morinaga researcher (ORCID 0000-0002-6325-5268) |
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| osamu morinaga researcher |
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| miku morinaga |
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