Last name Κωνσταντάκης (Constandache 
, Costandache , Κωνσταντάκης) , in all the world, is quite a rare surname. The last name Κωνσταντάκης is characteristic of Romania, where it is quite a common surname, Italy, where it is a rare surname, and Spain, where it is a very rare surname. In absolute terms, this name is the most popular in Romania, Italy, and Germany. Very seldom, Κωνσταντάκης is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Constandache, Costandache | Germany, Romania, Italy, Spain, France |
| Costandachi | Italy, Romania |
| κωνσταντάκης δεληγιάννης Greek politician, GR (b. 1786) |
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| γιάννης κωνσταντάκης Greek vet and writer (1939-1993), GR (b. 1939) |
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