marka

/marka/

Cases

SingularPluralWhen to use it
nominativemarkathe stampmarkalathe stampsthe plain dictionary form — the doer of the sentence
genitivemarkanıthe stamp'smarkalanıthe stamps'the owner — whose it is
accusativemarkanıthe stamp (as the object)markalanıthe stamps (as the object)a specific, known object — whom or what
dativemarkağato the stampmarkalağato the stampsdirection or recipient — to where, to whom
locativemarkadaat / in the stampmarkaladaat / in the stampswhere it is; also having — mende bar, "I have it"
ablativemarkadanfrom the stampmarkaladanfrom the stampswhere 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
mymarkammy stampmarkalarımmy stamps
yourmarkangyour stampmarkalarıngyour stamps
his / hermarkasıhis / her stampmarkalarıhis / her stamps
ourmarkabızour stampmarkalarıbızour stamps
you all'smarkağızyou all's stampmarkalarığızyou all's stamps
theirmarkalarıtheir stampmarkalarıtheir stamps

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