Syllabification Κω-στά-κης Gender masculine Κωστάκης is a diminutive form of Greek name Κώστας. Saints Constantine and his mother Helen, the Equals to the Apostles Feast day May 21 When is Κωστάκης's name day? Κωστάκης's Day is celebrated on May 21 in memory of Saints Constantine and his mother Helen. Name form diminutive Transcriptions Kostakis (la) Log in or register to post comments Be the first to rate this name Leave this field blank Copied to clipboard