Worldwide, Ευθυμίου (Eftimiu 
, Efthimiou 
, Ευθυμίου ) is a very rare male first name. The forename Ευθυμίου is habitual in Eastern Europe, particularly Romania, where it is a rare boy's name. Much more prevalently, Ευθυμίου is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Eftimiu | Germany, Romania, Bulgaria, United States, Greece |
| Efthimiou | Germany, Cyprus, Australia, United States, Greece |
| Ευθυμίου | Greece |
| Euthymiou | Brazil, South Africa |
| μιχαλάκης ευθυμίου CY |
|