Gender masculine Θάνος is a short form of Greek name Θανάσης.Feasts and saints related to given name Θάνος Saints Athanasius and Cyril, Patriarchs of Alexandria Feast day January 18 When is Θάνος's name day? Θάνος's Day is celebrated on January 18 in memory of Saints Athanasius and Cyril. Transcriptions Thanos (la) Log in or register to post comments 0 Leave this field blank 1 votes with an average rating of 25%.