The Hostrozeen family were a family of Raxacoricofallapatorians descended from the Huspick Degenerate. (WC: Monster File: Slitheen)
In Glune Fex Fize Sharlaveer-Slam Slitheen's plan to strip Sol of its energy and sell the remains of Earth, one of his priorities afterwards was revenge on the Hostrozeen once the Slitheen returned to Raxacoricofallapatorius. (TV: Revenge of the Slitheen)