The word is a part from an inscription carved into a stone column ,dated back to a 9th century.The column has been found in Bulgaria.
In that case, ohsi, PANFYMON is more likely to be a Slavic word derived from a Greek epithet, perhaps formed from
pan, "completely" +
thymοō, "rage," "be high-spirited" (cf.
panthymadon, Adv., "most heartily," Homer,
Odyssey 18.33). Maybe PANFYMON =
panthymos in the accusative singular or genitive plural case.