§52. Greek Nouns of the Second Declension

Greek nouns of the Second Declension end in -os, -ōs, masculine or feminine, and in -on neuter.

They are mostly proper names and are declined as follows in the Singular, the Plural, when found, being regular:—

a. Many names in -ēs belonging to the third declension have also a genitive in -ī: as, Thūcȳdidēs, Thūcȳdidī (compare § 44. b).

b. Several names in -er have also a nominative in -us: as, Teucer or Teucrus. The name Panthūs has the vocative Panthū (§ 81. 3).

c. The genitive plural of certain titles of books takes the Greek termination -ōn: as, Geōrgicōn, of the Georgics.

d. The termination -oe (for Greek -οι) is sometimes found in the nominative plural: as, Adelphoe, the Adelphi (a play of Terence).

e. Greek names in -eus (like Orpheus) have forms of the second and third declensions (see § 82).