kül

/ kyl /

Cases

SingularPluralWhen to use it
nominative kül the ashes külle the asheses the plain dictionary form — the doer of the sentence
genitive külnü the ashes' külleni the asheses' the owner — whose it is
accusative külnü the ashes (as the object) külleni the asheses (as the object) a specific, known object — whom or what
dative külge to the ashes küllege to the asheses direction or recipient — to where, to whom
locative külde at / in the ashes küllede at / in the asheses where it is; also having — mende bar, "I have it"
ablative külden from the ashes külleden from the asheses 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 külüm my ashes küllerim my asheses
your külüŋ your ashes külleriŋ your asheses
his / her külü his / her ashes külleri his / her asheses
our külübüz our ashes külleribiz our asheses
you all's külügüz you all's ashes küllerigiz you all's asheses
their külleri their ashes külleri their asheses

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