hat

/xat/

Cases

SingularPluralWhen to use it
nominativehatthe handwritinghatlathe handwritingsthe plain dictionary form — the doer of the sentence
genitivehatnıthe handwriting'shatlanıthe handwritings'the owner — whose it is
accusativehatnıthe handwriting (as the object)hatlanıthe handwritings (as the object)a specific, known object — whom or what
dativehathato the handwritinghatlağato the handwritingsdirection or recipient — to where, to whom
locativehatdaat / in the handwritinghatladaat / in the handwritingswhere it is; also having — mende bar, "I have it"
ablativehatdanfrom the handwritinghatladanfrom the handwritingswhere 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
myhatımmy handwritinghatlarımmy handwritings
yourhatıngyour handwritinghatlarıngyour handwritings
his / herhatıhis / her handwritinghatlarıhis / her handwritings
ourhatıbızour handwritinghatlarıbızour handwritings
you all'shatığızyou all's handwritinghatlarığızyou all's handwritings
theirhatlarıtheir handwritinghatlarıtheir handwritings

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