ata

/ ata /

Cases

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

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