In 2370, Lieutenant Ro Laren was sent to Ronara on an undercover mission to infiltrate the Maquis. She was masquerading as a Starfleet fugitive, and successfully caught the attention of Santos, who brought her to a Maquis colony. (TNG: "Preemptive Strike")
Background information Edit
According to the script, the pronunciation of Ronara was "ruh-NAH-ruh". 
According to the Star Trek: Star Charts, on page 47 and on the chart "United Federation of Planets I", Ronara Prime was located in the Ronara star system. This system was located in the Alpha Quadrant. The system's primary was a Class F star. It had a magnitude of +5, which was the same brightness of Sol. By 2378, Ronara Prime had become a Federation member.