The dominant family names in Koromilea are Tserpes, Krompas, Konstantakopoulos (Greek: Τσερπές, Κρόμπας, Κωνσταντακόπουλος).
The most common family names in Koromilea are Tserpes, Krompas, and Konstantakopoulos (Greek: Τσερπές, Κρόμπας, Κωνσταντακόπουλος).