tabın

/tabɯn/

Cases

SingularPluralWhen to use it
nominativetabınthe grouptabınlathe groupsthe plain dictionary form — the doer of the sentence
genitivetabınnıthe group'stabınlanıthe groups'the owner — whose it is
accusativetabınnıthe group (as the object)tabınlanıthe groups (as the object)a specific, known object — whom or what
dativetabıngato the grouptabınlağato the groupsdirection or recipient — to where, to whom
locativetabındaat / in the grouptabınladaat / in the groupswhere it is; also having — mende bar, "I have it"
ablativetabındanfrom the grouptabınladanfrom the groupswhere 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
mytabınımmy grouptabınlarımmy groups
yourtabınıngyour grouptabınlarıngyour groups
his / hertabınıhis / her grouptabınlarıhis / her groups
ourtabınıbızour grouptabınlarıbızour groups
you all'stabınığızyou all's grouptabınlarığızyou all's groups
theirtabınlarıtheir grouptabınlarıtheir groups

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