kart ata

/ qart ata /

Cases

SingularPluralWhen to use it
nominative kart ata the grandfather kart atala the grandfathers the plain dictionary form — the doer of the sentence
genitive kart atanı the grandfather's kart atalanı the grandfathers' the owner — whose it is
accusative kart atanı the grandfather (as the object) kart atalanı the grandfathers (as the object) a specific, known object — whom or what
dative kart atağa to the grandfather kart atalağa to the grandfathers direction or recipient — to where, to whom
locative kart atada at / in the grandfather kart atalada at / in the grandfathers where it is; also having — mende bar, "I have it"
ablative kart atadan from the grandfather kart ataladan from the grandfathers 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 kart atam my grandfather kart atalarım my grandfathers
your kart atang your grandfather kart atalarıng your grandfathers
his / her kart atası his / her grandfather kart ataları his / her grandfathers
our kart atabız our grandfather kart atalarıbız our grandfathers
you all's kart atağız you all's grandfather kart atalarığız you all's grandfathers
their kart ataları their grandfather kart ataları their grandfathers

The overlap in the last rows is real, not a mistake: kart ataları can mean "his / her grandfathers", "their grandfather", or "their grandfathers" — context decides.