Surname 水城 (水城 
) , in the entire world, is a very rare cognomen. The last name 水城 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 水城 is the forename as well as the last name.
| 水城武彦 Japanese journalist, JP (b. 1939) |
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| 水城まさひと Japanese mangaka and animator, JP (b. 1964) |
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| 水城エリカ JP |
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| 水城さくら JP (b. 1991) |
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