Family name Costache (Costache 
, Костаке 
, Κωστάκης 
) , all around the world, is a common last name. The cognomen Costache is characteristic of Romania, where it is a common surname, Moldova, where it is quite a rare surname, and Afghanistan, where it is a rare surname. In absolute terms, it is the most numerous in Romania, Italy, and Afghanistan. Much less frequently, Costache is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Costache | Romania, Italy, Spain, Moldova, Afghanistan |
| Костаке | Russia, Ukraine |
| Κωστάκης | Greece |
| קוסטקה | Israel |
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veniamin costache RO (b. 1768) |
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costache conachi writer, RO (b. 1778) |
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costache negri Romanian politician and writer, RO (b. 1812) |
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costache caragiale Romanian actor and theatre manager, RO (b. 1815) |
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| costache faca (b. 1801) |
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| costache bălănescu Romanian stage actor, RO (b. 1830) |
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costache leancă Bessarabian politician, RO (b. 1893) |
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| costache radu (b. 1844) |
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mircea costache ii Romanian handball player and coach, RO (b. 1940) |
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| costache antoniu Romanian actor, RO (b. 1900) |
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| costache florea Romanian trumpeter, RO (b. 1911) |
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| costache ioanid Romanian writer and poet, RO (b. 1912) |
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| costache agafiței RO (b. 1909) |
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| costache sava Romanian politician, RO (b. 1928) |
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| costache lazăr RO (b. 1919) |
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