sohan

/soxan/

Cases

SingularPluralWhen to use it
nominativesohanthe onionsohanlathe onionsthe plain dictionary form — the doer of the sentence
genitivesohannıthe onion'ssohanlanıthe onions'the owner — whose it is
accusativesohannıthe onion (as the object)sohanlanıthe onions (as the object)a specific, known object — whom or what
dativesohangato the onionsohanlağato the onionsdirection or recipient — to where, to whom
locativesohandaat / in the onionsohanladaat / in the onionswhere it is; also having — mende bar, "I have it"
ablativesohandanfrom the onionsohanladanfrom the onionswhere 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
mysohanımmy onionsohanlarımmy onions
yoursohanıngyour onionsohanlarıngyour onions
his / hersohanıhis / her onionsohanlarıhis / her onions
oursohanıbızour onionsohanlarıbızour onions
you all'ssohanığızyou all's onionsohanlarığızyou all's onions
theirsohanlarıtheir onionsohanlarıtheir onions

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