Around the world, 繁雄 (Shigeo 
, 繁雄 ) is quite a rare gender-neutral first name. The forename 繁雄 is characteristic of Japan, where it is quite a rare epicene name, the United States, where it is a very rare predominantly boy's, but scarcely female name, and China, where it is a very rare masculine name. Also, 繁雄 is the last name as well as the forename.
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桶谷繁雄 Japanese metallurgist, JP (b. 1910) |
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| 山内繁雄 Japanese physiologist, JP (b. 1876) |
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植竹繁雄 Japanese politician (1930-2012), JP (b. 1930) |
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大前繁雄 Japanese politician, JP (b. 1942) |
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| 福田繁雄 Japanese artist (1932-2009), JP (b. 1932) |
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| 長谷川繁雄 Japanese baseball player (1932-1966), JP (b. 1932) |
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| 竹中繁雄 Japanese ambassador, JP (b. 1941) |
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| 伊藤繁雄 Japanese table tennis player, JP (b. 1945) |
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| 丸山繁雄 Japanese singer and bandleader, JP (b. 1951) |
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| 上手繁雄 JP (b. 1953) |
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| 後藤繁雄 JP (b. 1954) |
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