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Worldwide, Siao (Siao
, Сяо
, เสี่ยว) is a rare gender-neutral first name. The first name Siao is characteristic of Taiwan, where it is a rare female name, Singapore, where it is a rare epicene name, and Kazakhstan, where it is a rare male name. Measured by absolute frequency, it is the most numerous in Indonesia, Taiwan, and China. More frequently, Siao is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Siao | Philippines, Tanzania, Malaysia, Taiwan, United States |
| Сяо | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
Siao is also a name for the fictitious and mythical characters: .