Khefka IV was the inhabited fourth planet in its star system. This world was the location of a Federation Consulate in the mid-24th century.
Verad was stationed there as a communications clerk at some point before 2370, and he took a native called Mareel under his care, rescuing her from the rough street-life on the planet, and taking her with him when he was recalled to Trill. (DS9: "Invasive Procedures")
This planet was only mentioned in dialogue.
According to StarTrek.com
, the pronunciation for Khefka was "KEFF-kuh". Furthermore, Khefka was the name of a star
in the Federation sphere of influence, and that Khefka IV was Class M