Family name Oleka (Oleka 
) , across the world, is quite a rare cognomen. The cognomen Oleka is habitual in Lithuania, where it is quite a rare surname, the Democratic Republic of the Congo, and Nigeria. Also, Oleka is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oleka | Ethiopia, Nigeria, Democratic Republic of the Congo, United States, Lithuania |
| kazimieras oleka DE (b. 1880) |
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| oleka k. udeala Nigerian academic (b. 1940) |
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| ramutis oleka LT (b. 1942) |
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| napoleon azubuike oleka Ph.D. Temple University 1998 |
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| obinna oleka American basketball player (1993-), US (b. 1993) |
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