Ferenginar was the homeworld of the Ferengi and the capital of the Ferengi Alliance. Located in the Alpha Quadrant the class M planet was known for its nearly constant torrential rain.
The Tarak was a creature native to Ferenginar. (Star Trek: Phoenix-X: "Crash Bandicoots")
In 2352, Breawyn Lem and her twin sister Mirwen are born to Tichy and Ikona Pirx on Ferenginar. (Starship Independence)
The Haryalevard Academy of Business Management was an university on the planet, extant as of 2402. (Star Trek: The Stoneship Files: "Post-Apocalyptic Education")