kolonna

/kolonna/

Cases

SingularPluralWhen to use it
nominativekolonnathe columnkolonnalathe columnsthe plain dictionary form — the doer of the sentence
genitivekolonnanıthe column'skolonnalanıthe columns'the owner — whose it is
accusativekolonnanıthe column (as the object)kolonnalanıthe columns (as the object)a specific, known object — whom or what
dativekolonnağato the columnkolonnalağato the columnsdirection or recipient — to where, to whom
locativekolonnadaat / in the columnkolonnaladaat / in the columnswhere it is; also having — mende bar, "I have it"
ablativekolonnadanfrom the columnkolonnaladanfrom the columnswhere 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
mykolonnammy columnkolonnalarımmy columns
yourkolonnangyour columnkolonnalarıngyour columns
his / herkolonnasıhis / her columnkolonnalarıhis / her columns
ourkolonnabızour columnkolonnalarıbızour columns
you all'skolonnağızyou all's columnkolonnalarığızyou all's columns
theirkolonnalarıtheir columnkolonnalarıtheir columns

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