genetivus

Etymology
From, the perfect passive participial stem of , + , with the vowel changed to. In the grammatical sense, possibly a.

Adjective

 * 1) of or related to the act of generation or birth: productive, creative, causal
 * (all as in Late Latin)
 * 1) native
 * 2) belonging to a family or gens

Noun

 * 1)  genitive