Cognomen Čajka (Чайка 
, Čajka 
) , all over the world, is a common last name. The cognomen Čajka is habitual in Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, and Russia, where it is quite a rare surname.
| bohumír čajka CZ (b. 1883) |
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| dušan čajka SK (b. 1897) |
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luděk čajka Czech ice hockey player (1963-1990), CZ (b. 1963) |
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| jozef h. čajka SK (b. 1911) |
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| josef čajka (b. 1919) |
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| jaroslav čajka (b. 1941) |
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| galina čajka ballet dancer, KZ (b. 1971) |
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| radim čajka CZ (b. 1961) |
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| františek čajka Czech linguist (b. 1976) |
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| tomáš čajka researcher |
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| radek čajka (b. 1983) |
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| petr čajka Czech ice-hockey player, CZ |
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