Cognomen Jäykkä (Jäykkä 
) , around the globe, is an extremely rare surname. The family name Jäykkä is habitual in Northern Europe, particularly Finland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jäykkä | Finland |
| juho jäykkä Finnish translator, FI (b. 1837) |
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| erkki jäykkä (b. 1827) |
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| kalle jäykkä Finnish politician (1869-1951), FI (b. 1869) |
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