Last name Βλάσσης (Vlassis 
, Βλάσσης) , in the entire world, is quite a rare cognomen. The last name Βλάσσης is characteristic of Greece, where it is quite a common surname, Slovakia, where it is a rare surname, and Australia. Not in comparison with a country's population, this name is the most popular in Greece, the United States, and Australia. Very seldom, Βλάσσης is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vlassis | Greece, Germany, United States, Slovakia, Australia |
| θεόδωρος βλάσσης GR (b. 1800) |
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| αριστείδης βλάσσης Greek painter and engraver, GR (b. 1947) |
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| άγγελος βλάσσης Greek artist, 1948-, GR (b. 1948) |
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