The Ohniaka system was a planetary system. A planet in this system, Ohniaka III, was the location of a Federation research station. The system was in the same sector as the MS system and the New Berlin Colony. In 2369, this station was destroyed by rogue Borg. (TNG: "Descent")

According to the script, the pronunciation for Ohniaka was "oh-nee-AH-ka". [1]