Last name 龍一 (龍一 
) , globally, is an extremely rare cognomen. Much more prevalently, 龍一 is the forename as well as the last name.
| 西松 龍一 Japanese businessman, JP (b. 1903) |
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| 手嶋 龍一 Japanese novelist, JP (b. 1949) |
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| 酒井 龍一 Japanese singer, FR (b. 1970) |
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