Cognomen 六郎 (六郎 
) , in the world, is a very rare surname. The surname 六郎 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. Much more prevalently, 六郎 is the forename as well as the last name.
| 森 六郎 Japanese politician (1891-1974), JP (b. 1891) |
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| 上村 六郎 (b. 1894) |
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