Cognomen Matsunaga (マツナガ 
, Matsunaga 
, 松永 ) , globally, is quite a rare surname. The last name Matsunaga is habitual in Brazil, where it is a rare surname, Japan, and Hong Kong. In absolute terms, it is commonest in Brazil, Japan, and the United States. More frequently, Matsunaga is the forename as well as the last name.
| matsunaga nagayori samurai of the Sengoku period (b. 1550) |
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| matsunaga hisamichi (b. 1543) |
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spark matsunaga American politician (1916–1990), US (b. 1916) |
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mamoru matsunaga Dominican Republic judoka (1936-2016), JP (b. 1936) |
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| motogi matsunaga (b. 1891) |
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| kōgyoku matsunaga (b. 1902) |
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| joseph hisajiro matsunaga Japanese bishop (b. 1930) |
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daniel matsunaga Brazilian association football player, BR (b. 1988) |
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| alicia matsunaga (b. 1932) |
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| kayoko matsunaga Japanese dermatologist (b. 1951) |
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| yasuhiko matsunaga Japanese darts player, JP (b. 1961) |
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| louella matsunaga GB (b. 1959) |
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| rui matsunaga (b. 1968) |
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| kouhei matsunaga Japanese musician, JP (b. 1978) |
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| keiko matsunaga researcher (ORCID 0000-0002-6950-7470) |
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