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Surname Siyi (Siyi
) , throughout the world, is a rare last name. The surname Siyi is habitual in Taiwan, where it is a rare surname, Singapore, and Malaysia. Measured by absolute frequency, it most frequently occurs in China, Taiwan, and Malaysia. More prevalently, Siyi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siyi | Japan, Taiwan, United States, Democratic Republic of the Congo, China |