Cognomen Katriňák (Katriňák 
) , throughout the world, is a very rare family name. The last name Katriňák is habitual in Eastern Europe, particularly Slovakia, where it is quite a rare surname.
| tibor katriňák Slovak mathematician, SK (b. 1937) |
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| jaroslav katriňák Slovak motorcycle racer, SK (b. 1966) |
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