ökül

/ økyl /

Cases

SingularPluralWhen to use it
nominative ökül the defender ökülle the defenders the plain dictionary form — the doer of the sentence
genitive ökülnü the defender's ökülleni the defenders' the owner — whose it is
accusative ökülnü the defender (as the object) ökülleni the defenders (as the object) a specific, known object — whom or what
dative ökülge to the defender öküllege to the defenders direction or recipient — to where, to whom
locative ökülde at / in the defender öküllede at / in the defenders where it is; also having — mende bar, "I have it"
ablative ökülden from the defender ökülleden from the defenders where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
my ökülüm my defender öküllerim my defenders
your ökülüŋ your defender ökülleriŋ your defenders
his / her ökülü his / her defender ökülleri his / her defenders
our ökülübüz our defender ökülleribiz our defenders
you all's ökülügüz you all's defender öküllerigiz you all's defenders
their ökülleri their defender ökülleri their defenders

The overlap in the last rows is real, not a mistake: ökülleri can mean "his / her defenders", "their defender", or "their defenders" — context decides.