Surname 筒 (筒 
, Tsutsu 
) , worldwide, is quite a rare family name. The cognomen 筒 is habitual in South Africa, where it is a rare surname, Kenya, and Bulgaria. Not in comparison with a country's population, it is the most numerous in China, South Africa, and Kenya. Likewise, 筒 is the forename as well as the last name.
| 筒美奈子 Japanese seiyū, JP (b. 1976) |
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