Abderus

In accounts of Heracles' Eighth Labor (the Mares of Diomedes) Abderus appears as a young companion or attendant of Heracles. Sources report that Heracles left the man-eating mares in Abderus' care after capturing them; while Heracles was away the mares killed Abderus, either by dragging him after they bolted or by devouring him. In the aftermath Heracles buried Abderus with honors, erected a ceremonial tomb, and founded the city of Abdera near that tomb. Genealogical traditions vary: some sources (reported in the surviving summaries) present him as son of Hermes, others as son of Poseidon or as a Locrian (son of Thromius), and some authors describe him as one of Heracles' eromenoi (beloved youths). The differing accounts (Apollodorus, Pindar, Strabo, Photius, Hellanicus are cited in the source summaries) reflect variant local traditions rather than a single canonical genealogy.

Literary sources do not give a detailed physical description; surviving commentary and iconographic discussion portray him as a youthful attendant — Philostratus records Heracles building "the handsome youth a grand tomb" — and some vase-paintings and imagines-scenes show a naked youth standing near the Mares of Diomedes. Specifics such as height, clothing, or distinguishing marks are not preserved in the supplied materials.

Narratives portray Abderus as a mortal companion/attendant without independent supernatural powers. His literary significance rests on his role in the Heraclean episode (helping to capture the mares and being left to tend them) and his subsequent cultic/eponymous function: his burial by Heracles and the foundation of Abdera explain local commemorative practice. Sources do not attribute magical abilities, dangerous agency, or possession to him.