insan

/ insan /

Cases

SingularPluralWhen to use it
nominative insan the person insanla the people the plain dictionary form — the doer of the sentence
genitive insannı the person's insanlanı the people's the owner — whose it is
accusative insannı the person (as the object) insanlanı the people (as the object) a specific, known object — whom or what
dative insanğa to the person insanlağa to the people direction or recipient — to where, to whom
locative insanda at / in the person insanlada at / in the people where it is; also having — mende bar, "I have it"
ablative insandan from the person insanladan from the people 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
my insanım my person insanlarım my people
your insanıŋ your person insanlarıŋ your people
his / her insanı his / her person insanları his / her people
our insanıbız our person insanlarıbız our people
you all's insanığız you all's person insanlarığız you all's people
their insanları their person insanları their people

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