Zaporoviensis

Zaporovia +‎ -ēnsis. Compare Middle Polish zaporowski (“Zaporozhian”).

Zaporoviēnsis (neuter Zaporoviēnse); third-declension two-termination adjective

1. (New Latin) Zaporozhian (relating to the Cossacks who lived downstream of the rapids of the Dnieper/Dnipro River, in present-day Ukraine; to the region of Zaporizhzhia inhabited by them)
   • 1710 April 5, Philippus Orlik, chapter XVI, in Pacta et Constitutiones legum libertatumque Exercitus Zaporoviensis‎^[1], Bender:

     Ego Philippus Orlik, Neoelectus Exercitus Zaporoviensis Dux, iuro in Dominum Deum, in Trinitate Sancta glorificatum, supra hoc: [...]

     I Pylyp Orlyk, newly-elected Hetman of the Zaporozhian Host, swear by the Lord God, glorified in the Holy Trinity, on the following: [...]

Third-declension two-termination adjective.