Person or city.
- "The scolloped tatters of the King in Yellow must hide Yhtill forever"
The entry in Fantastic Worlds describes either the Stranger or the King In Yellow. In Broadalbin and Delta Green: Countdown, it is stated that Yhtill is a city that has previously been absorbed by Carcosa. It also appears in The Night World of the Insylum RPG.
According To The Encyclopedia Cthulhiana
- According to one source, the name of the city in which the play The King In Yellow is set.
- The word "Yhtill" means "stranger" in the language of the city of Alar. It is this word that the Pallid Mask gives as his name when he enters the city of Hastur.