-ius

Etymology 1
From, from , from. Cognate with Ancient Greek.

Usage notes
The suffix -ius is added to a noun to form an adjective indicating "made of" or "belonging to" that noun.
 * Examples:

In taxonomics, out of analogy with ancient Roman nomina gentilicia, this suffix is added to surnames ending in a consonant other than the ending -er and, sometimes, replacing a mute final -e.
 * Examples:

Etymology 2
See.

Etymology 3
See.

Etymology 4
From, itself from secondarily marked with the genitive *-s.

Suffix

 * 1) the regular genitive singular suffix for most pronouns
 * , (alongside, )
 * , (alongside, )
 * , (alongside, )
 * , (alongside, )

Usage notes
Like 3d- and 4th-declension, and unlike 1st- and 2nd-declension forms, has one form for all genders. A gendered adjective option also exists for cuius.