In the television show and video game, Defiance, Irisa was an Irathient, one of the alien Votan races that settled on Earth in the future. She was adopted as a child by Joshua Nolan. She was implanted with a Kelovan or key, which would allow her to mentally control the Kaziri, a Votan ship. She became Nolan's deputy lawkeeper in the town of Defiance.
IRISA is the acronym for the Research Institute of Computer Science and Random Systems in Rennes, France. The acronym is derived from it's French name, "Institut de recherche en informatique et systèmes aléatoires".
Irisa is a variant of Iris, a Greek name that means 'rainbow'. In English, it is a type of flower. In 2014, 8 girls were named Irisa in the U.S.