One entry on the list:
Atreides vs HarkonnenRead about the other vendettas on the list.
The names sound like a mix of Greek tragedy and Icelandic saga, but this is the sci-fi world of Frank Herbert's Dune (and its many sequels). A feud has raged between these families for thousands of years on the desert planet Arakis, only source of the priceless spice mélange. The politics of this murderous struggle are byzantine, and only for the devoted reader.
Dune is also on John Mullan's list of ten of the best deserts in literature and among the best and worst childbirth scenes in sci-fi & fantasy.