dekan

/dekan/

Cases

SingularPluralWhen to use it
nominativedekanthe deandekanlathe deansthe plain dictionary form — the doer of the sentence
genitivedekannıthe dean'sdekanlanıthe deans'the owner — whose it is
accusativedekannıthe dean (as the object)dekanlanıthe deans (as the object)a specific, known object — whom or what
dativedekangato the deandekanlağato the deansdirection or recipient — to where, to whom
locativedekandaat / in the deandekanladaat / in the deanswhere it is; also having — mende bar, "I have it"
ablativedekandanfrom the deandekanladanfrom the deanswhere 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
mydekanımmy deandekanlarımmy deans
yourdekanıngyour deandekanlarıngyour deans
his / herdekanıhis / her deandekanlarıhis / her deans
ourdekanıbızour deandekanlarıbızour deans
you all'sdekanığızyou all's deandekanlarığızyou all's deans
theirdekanlarıtheir deandekanlarıtheir deans

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