Strange, trivial, but amusing all the same...

The githyanki are a fictional race, first created by George R. R. Martin in his science fiction novel Dying of the Light. The name was later borrowed by Charles Stross who used it for one of the fantasy races he created for his Advanced Dungeons & Dragons campaign. It was first published in the White Dwarf magazine in the late 1970s, and in 1981 in the Fiend Folio official AD&D expansion. George R. R. Martin himself was not aware of the name being borrowed until the 2000s. Apart from Martin's novel, the Githyanki/Illithid relationship was inspired by Larry Niven's World of Ptavvs.