The Grisellans were a race native to the planet Grisella.
The Grisellan culture extends back thousands of years. The early Hrabotnik period, during which treasured Grisellan totem icons were created, occurred at least two thousand years ago. (DS9 - Worlds of Star Trek: Deep Space Nine novel: Ferenginar: Satisfaction is Not Guaranteed)
The Grisellans hosted a peace summit between Federation President Nanietta Bacco, Klingon Chancellor Martok, and Empress of the Romulan Star Empire Tal'Aura in late 2380. (ST novel: Articles of the Federation)