Surname Siyoi (Siyoi 
) , in the entire world, is a rare last name. The surname Siyoi is characteristic of Sub-Saharan Africa, particularly Kenya, where it is a rare surname, and Tanzania, where it is a very rare surname. Very seldom, Siyoi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siyoi | Tanzania, Kenya, India |
| fred siyoi researcher |
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| fred siyoi Kenyan politician, KE |
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