Family name Келдыш (Keldych 
, Келдыш 
) , in the world, is a rare surname. The surname Келдыш is habitual in Eastern Europe, particularly Russia, where it is a very rare surname. More prevalently, Келдыш is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Keldych | Democratic Republic of the Congo |
| Келдыш | Russia |
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мстислав всеволодович келдыш Soviet mathematician and physicist (1911-1978), LV (b. 1911) |
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| всеволод михайлович келдыш RU (b. 1878) |
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| людмила всеволодовна келдыш Soviet mathematician, RU (b. 1904) |
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| юрий всеволодович келдыш Soviet musicologist, RU (b. 1907) |
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| леонид вениаминович келдыш Soviet and Russian physicist (1931-2016), RU (b. 1931) |
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| всеволод александрович келдыш RU (b. 1929) |
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