Last name ケン (Ken 
, Yen 
, ケン ) , in the entire world, is a widespread surname. The cognomen ケン is characteristic of Malaysia, where it is a common surname, Norway, and Macao (explore the name in all countries). In absolute terms, it is commonest in Malaysia, Japan, and Indonesia. Also, ケン is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ken | United States, Japan, Kenya, Malaysia, Canada |
| Yen | United States, Hong Kong, Malaysia, Indonesia, Canada |
| ケン | Japan |
| Lunde | Norway, China, United States, Malaysia, Canada |
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ケン・イシイ Japanese DJ, JP (b. 1970) |
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| ケン月影 Japanese mangaka, JP (b. 1941) |
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| 若林ケン Japanese singer, JP (b. 1945) |
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| ケン・サンダース Japanese actor, JP (b. 1946) |
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| ケン・ケンセイ Japanese actor, JP (b. 1948) |
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| 上野ケン Japanese animator, JP (b. 1962) |
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| サカグチケン Japanese graphic designer, JP (b. 1964) |
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| クレーンケン Japanese illustrator, JP (b. 1967) |
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| ケン・ジョセフ JP (b. 1957) |
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| ケン・タニガワ American professional golfer (born 1967), JP (b. 1967) |
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| 川村ケン Japanese keyboardist, JP (b. 1968) |
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| ケン・ヤスダ Japanese bodybuilder, JP (b. 1971) |
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| ケン・マスイ Japanese disc jockey, JP (b. 1972) |
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| 浅野ケン Japanese composer, record producer and music arranger, JP (b. 1975) |
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| 安芸怜須ケン Japanese voice actor, JP |
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