LATIN DICTIONARYLexicon Latīnum
suffixfirst/second-declension suffix

-iānus

-iānus (feminine -iāna, neuter -iānum)
Classical[iˈaː.nʊs]Ecclesiastical[iˈaː.nus]

Meaning

  1. morphemesuffixEnlarged form of -ānus, especially frequent in adjectives formed from proper names.
    Catullus + -iānus → Catulliānus
    Cicerō (stem: Cicerōn-) + -iānus → Cicerōniānus

Origins

Perhaps from -i(us) + -ānus. Compare Proto-Slavic *-janъ.

Descendants
  • Catalan-ià
  • English-ian
  • Italian-iano
  • French-ienfrom Old French -ien
  • Portuguese-ião
  • Portuguese-iano
  • Romanian-ian
  • Spanish-iano
  • Asturian-ianu
  • Asturian-ián

Quick answers

What does -iānus mean in Latin?
-iānus, a suffix, means “Enlarged form of -ānus, especially frequent in adjectives formed from proper names.”.
How do you pronounce -iānus?
In classical Latin, [iˈaː.nʊs]; in ecclesiastical (church) Latin, [iˈaː.nus].