Lovecraft's works
Entities
Cthulhu
Hastur
Bokrug
Yog-Sothoth
Azathoth
Nyarlathotep
Shub-Niggurath
Nodens
Hypnos
Planets
Stronti
Yaddith
Kath
Yuggoth
Cities and places
Arinuria
Teloe
Celephais
Cytharion
Serannian
Thalarion
Sarnath
Sona-Nyl
Ulthar
Nir
Hatheg
Cathuria
R'Lyeh
Eryx
Leng
Other
Iranon (Dreamland(?) wanderer)
Shoggoth (Bio-engineered slave race)
Kuranes (Dreamland king)