Onomatopoieia, theory of, [358].

Ophir of the Bible, [203].

Origen, his opinion that Hebrew was the primitive language of mankind, [132].

Origin of language, consideration of the problem of the common, [326] et seq.

Ormuzd, the god of the Zoroastrians, mentioned by Plato, [207].

discovery of the name Auramazda in the cuneiform inscriptions, [207].

origin of the name Auramazda or Ormuzd, [207].

Os, the, of Ossethi, calling themselves Iron, [243].

Oscan language and literature, the [196].