PriaposLovs is back from a long weekend of practicing inertia in the villages of Peloponnese :) I suspect that Pythos is, as Nan perspicaciously pointed out, related to Pythia, the priestess of the Oracle of Delphi. Pythia, in turn, was names after Python, a mythical serpent demon killed by that s.o.b. Apollo near Delphi. Although the name Pythos is not recored in *A Lexicon of Greek Personal Names* (ed. P. M. Fraser and E. Matthews, Oxford University Press, 1987) -- the ultimate authority on Greek names (http://www.lgpn.ox.ac.uk/lgpn1.html) -- the following are related bona fide names: Python, Pythios, Pythis, Pythion, Pythan, Pytheos, Pythias, Pythocles.