from The Century Dictionary and Cyclopedia
- A titular epithet of the first archon (archon eponymos) in ancient Athens, and of the first ephor (ephor eponymos) in Sparta, because the year of the service of each was designated by his name in the public records, etc.
Sorry, no etymologies found.
Thus, I think that my initial suggestion for the words “eponymous”, “eponymity” and “eponymously”, just analogous to the Greek words “eponymos”, “eponymia” and “eponymws” here I used “w” for omega can be a good solution and, thus, I will keep using these words.
The king's military functions were absorbed by the war archon (polemarch) and his civil duties were absorbed by a civil archon (archon eponymos) after whom the year was named.
The name of the locality itself was derived from this "heros eponymos."
The Athenians dated their years by the name of their "first Archon" ( "Archon eponymos").
Many years ago it was pointed out that the Gilgamesh Epic was a composite tale in which various stories of an independent origin had been combined and brought into more or less artificial connection with the _heros eponymos_ of southern Babylonia.