Kleos (Ancient Greek: κλέος) is the Greek word often translated to "renown" or "glory". It is related to the English word "loud" and carries the implied meaning of "what others hear about you". A Greek hero earns kleos through accomplishing great deeds.
According to Gregory Nagy, besides the meaning of "glory", kleos can also be used as the medium (in this case, the ancient Greek poetry or song) which conveys glory.[1]
Kleos is invariably transferred from father to son; the son is responsible for carrying on and building upon the "glory" of the father. This is a reason for Penelope putting off her suitors for so long, and one justification for Medea's murder of her own children was to cut short Jason's kleos.
Kleos is a common theme in Homer's epics, the Iliad and the Odyssey, the main example in the latter being that of Odysseus and his son Telemachus, who is concerned that his father may have died a pathetic and pitiable death at sea rather than a reputable and gracious one in battle. The Iliad is about gaining ultimate kleos on the battlefields of Troy while the Odyssey is the ten-year quest of Odysseus' nostos (or return journey). Telemachus fears that he has been deprived of kleos. This links to hereditary kleos, as heroes obtain immortality through eternal fame of their actions and lineage.