Surname Ketner (Ketner 
) , across the world, is quite a rare family name. The last name Ketner is habitual in Slovakia, where it is quite a rare surname, Czechia, where it is a rare surname, and Slovenia. In absolute terms, it is the most numerous in the United States, Czechia, and Slovakia. Much less frequently, Ketner is the forename as well as the last name.
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| Ketner | Slovakia, Brazil, United States, Czechia, Poland |
| ralph ketner American businessperson (1920-2016), US (b. 1920) |
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| keith b. ketner (b. 1921) |
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| kenneth laine ketner (b. 1939) |
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| linda ketner (b. 1950) |
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| joseph d. ii. ketner (b. 1955) |
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| martin ketner CZ (b. 1965) |
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| lari ketner American basketball player, US (b. 1977) |
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| magnus b. ketner artist, n.d. |
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| kenneth laine ketner American philosopher |
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| susan liesbeth ketner (b. 1976) |
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| meti ketner SI |
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| nikolas ketner Czech ice hockey player (b. 1991) |
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