Family name Koga (コガ 
, Koga 
, كوجا 
) , all over the world, is quite a common last name. The surname Koga is habitual in Paraguay, where it is quite a rare surname, Zimbabwe, and Luxembourg. In absolute terms, this name is the most popular in Brazil, Japan, and the United States. More frequently, Koga is the forename as well as the last name.
| koga tomofusa (b. 1238) |
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| koga michinobu (b. 1487) |
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| koga haremichi (b. 1519) |
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| michitomo koga (b. 1660) |
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| michie koga (b. 1709) |
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| koga nobumichi (1744-1795) (b. 1744) |
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| toshimichi koga (b. 1735) |
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| toshio koga (b. 1855) |
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| tsunekichi koga (b. 1883) |
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| fujito koga (b. 1908) |
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| mary koga American photographer (1920-2001), US (b. 1920) |
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| kiyoto koga JP (b. 1910) |
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| akio koga (b. 1918) |
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| katsuhiko koga (b. 1921) |
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| hisayoshi koga (b. 1925) |
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