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In the world, Sieni (Sieni
) is a rare predominantly girly, but scarcely male forename. The forename Sieni is habitual in Tanzania, where it is a rare girly name, Indonesia, where it is a very rare female name, and Italy. Measured by absolute frequency, it is commonest in Indonesia, Tanzania, and Brazil. Also, Sieni is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sieni | Tanzania, Italy, Indonesia, South Africa, Cameroon |