[1][2] His name is also referred as Eurybates[3] or Eurybotos[4] and possibly Eurybotas elsewhere in Pausanias, both of the latter two have been anglicised to "Eurybotus" by editors, although elsewhere the distinction is preserved.
Eurybus was quite possibly the noted discobole Eurybotas depicted on the Chest of Cypselus, which was left as a votive offering at Olympia and was still visible there centuries later and was subject to a detailed description by Pausanias.
He does not explicitly say that this discus-thrower Eurybotas is the same as the runner Eurybotos; however, the transcriptions of named personages on the chest as given by Pausanias show Doricisms and traces of having been rendered in the epichoric Corinthian alphabet.
[6] Pausanias reports a legend that the infant Cypselus was hidden in the chest during an assassination attempt and later took his name from it (as the Corinthians called these chests kypselai); however, Cypselus's childhood (he died in 627 BC after a thirty-year reign begun when fully adult) coincides with the known date of Eurybatos' stadion victory.
[8] Dionysius of Halicarnassus calls the race-winner Eurybates, says that the contemporaneous eponymous archon at Athens was Leostratus, and uses his Olympic victory to date the accession of Tullus Hostilius as King of Rome after the death of Numa Pompilius.