Heleon (Plin.). A town in Boeotia, mentioned by Homer in the same line with Hyle
and Peteon, is said by Strabo to have been one of the smaller places in the territory
of Tanagra, and to have derived its name from its marshy situation. Its site is
uncertain: Leake places it on the shore of the lake Paralimni, but Muller and
Kiepert near Tanagra on the right bank of the Asopus.
Dictionary of Greek and Roman Geography (1854) (ed. William Smith, LLD)