gön

/ɡøn/

Cases

SingularPluralWhen to use it
nominativegönthe dressed leathergönlethe dressed leathersthe plain dictionary form — the doer of the sentence
genitivegönnüthe dressed leather'sgönlenithe dressed leathers'the owner — whose it is
accusativegönnüthe dressed leather (as the object)gönlenithe dressed leathers (as the object)a specific, known object — whom or what
dativegöngeto the dressed leathergönlegeto the dressed leathersdirection or recipient — to where, to whom
locativegöndeat / in the dressed leathergönledeat / in the dressed leatherswhere it is; also having — mende bar, "I have it"
ablativegöndenfrom the dressed leathergönledenfrom the dressed leatherswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
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
mygönümmy dressed leathergönlerimmy dressed leathers
yourgönüngyour dressed leathergönleringyour dressed leathers
his / hergönühis / her dressed leathergönlerihis / her dressed leathers
ourgönübüzour dressed leathergönleribizour dressed leathers
you all'sgönügüzyou all's dressed leathergönlerigizyou all's dressed leathers
theirgönleritheir dressed leathergönleritheir dressed leathers

The overlap in the last rows is real, not a mistake: gönleri can mean "his / her dressed leathers", "their dressed leather", or "their dressed leathers" — context decides.