atlas

/atlas/

Cases

SingularPluralWhen to use it
nominativeatlasthe atlasatlaslathe atlasesthe plain dictionary form — the doer of the sentence
genitiveatlasnıthe atlas'atlaslanıthe atlases'the owner — whose it is
accusativeatlasnıthe atlas (as the object)atlaslanıthe atlases (as the object)a specific, known object — whom or what
dativeatlashato the atlasatlaslağato the atlasesdirection or recipient — to where, to whom
locativeatlasdaat / in the atlasatlasladaat / in the atlaseswhere it is; also having — mende bar, "I have it"
ablativeatlasdanfrom the atlasatlasladanfrom the atlaseswhere 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
myatlasımmy atlasatlaslarımmy atlases
youratlasıngyour atlasatlaslarıngyour atlases
his / heratlasıhis / her atlasatlaslarıhis / her atlases
ouratlasıbızour atlasatlaslarıbızour atlases
you all'satlasığızyou all's atlasatlaslarığızyou all's atlases
theiratlaslarıtheir atlasatlaslarıtheir atlases

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