Rackateen family
The Rackateen Family were a family of Raxacoricofallapatorians who were cousins to the criminal Slitheen (TV: Boom Town) and descendants of colonists on Clom. (WC: Monster File: Slitheen)
They had been involved in criminal dealings in the past, but they kept this a secret from their people, as they knew that if they found out they would be exiled and hunted down. (PROSE: Doctor Who Files 3: The Slitheen)
They enjoyed food from other planets. (TV: The Gift)
The Krytaleen Family was the descendants of the Rakateen family. The Rakateen Family and the Krytaleen Family tired to destroy the entire Raxa Alliance, the Rakateen Family almost succeeded in sending Raxacoricofallapatorius, Clom, Clix, Raxacoricovarlonpatorius into a black hole But the Four planets stopped them and hunted most of the Rakateen Family down. So the last of the Rakateen Family changed there identity to the Krytaleen family Four of them went to Earth led by Pylen Racri Prawn Holcor-Lorn Krytaleen and his brother Halke Crast Holcor-Lorn Krytaleen and his wife Jike and His chid Hask Krytaleen. Like The Slitheen there were branches of families like the Holcor-Lorn Krytaleen and the Sataleem-Jol Krytaleen. The Krytaleen said that they wanted to have Revenge on Raxacoricofallapatorius and the Shadow Proclamation, so that the Rackateen and the Slitheen can be avenged.
Behind the scenes
Rakateen were due to appear in The Sarah Jane Adventures but the suits made ended up being used for the Slitheen-Blathereen family.