jam

/dʒam/

Cases

FormWhen to use it
nominativejamthe coatthe plain dictionary form — the doer of the sentence
genitivejamnıthe coat'sthe owner — whose it is
accusativejamnıthe coat (as the object)a specific, known object — whom or what
dativejamğato the coatdirection or recipient — to where, to whom
locativejamdaat / in the coatwhere it is; also having — mende bar, "I have it"
ablativejamdanfrom the coatwhere 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

Owned
myjamımmy coat
yourjamıngyour coat
his / herjamıhis / her coat
ourjamıbızour coat
you all'sjamığızyou all's coat
theirjamlarıtheir coat

There is no plural of this word. The ending would attach like any other — it is the word, not the grammar, that refuses: this is not something Karachay counts.