Throughout the world, Недялко (Недялко 
, Nedyalko 
, Nedialko 
) is quite a common male given name. The first name Недялко is characteristic of Bulgaria, where it is quite a common boy's name, Greece, where it is a rare masculine name, and Spain, where it is a very rare boy's name. Very seldom, Недялко is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Недялко | Russia, Ukraine, Bulgaria |
| Nedyalko | Greece, Spain, Bulgaria, United States, United Kingdom |
| Nedialko | Greece, Germany, Bulgaria, United Kingdom, United States |
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недялко килев BG (b. 1882) |
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недялко велев BG (b. 1908) |
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| недялко тодоров BG (b. 1862) |
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недялко делков botanist (1929-1998), BG (b. 1929) |
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| недялко каранешев BG (b. 1876) |
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| недялко атанасов BG (b. 1881) |
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| недялко бойкикев Bulgarian activist, BG (b. 1894) |
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недялко славов Bulgarian writer, BG (b. 1952) |
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| недялко романов BG (b. 1911) |
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| недялко панчев BG (b. 1917) |
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| недялко йорданов Bulgarian writer, BG (b. 1940) |
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| недялко стамболиев Bulgarian association football player (1947-), BG (b. 1947) |
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| недялко топалов Bulgarian association football player (1979-), BG (b. 1979) |
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| недялко хубенов Bulgarian footballer, BG (b. 1979) |
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