üg

/ yɡ /

Cases

SingularPluralWhen to use it
nominative üg the south ügle the souths the plain dictionary form — the doer of the sentence
genitive ügnü the south's ügleni the souths' the owner — whose it is
accusative ügnü the south (as the object) ügleni the souths (as the object) a specific, known object — whom or what
dative ügge to the south üglege to the souths direction or recipient — to where, to whom
locative ügde at / in the south üglede at / in the souths where it is; also having — mende bar, "I have it"
ablative ügden from the south ügleden from the souths 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 ügüm my south üglerim my souths
your ügüŋ your south ügleriŋ your souths
his / her ügü his / her south ügleri his / her souths
our ügübüz our south ügleribiz our souths
you all's ügügüz you all's south üglerigiz you all's souths
their ügleri their south ügleri their souths

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