Theion may refer to

• {{lang|grc|θεῖον}}, Greek for "sulfur"
• {{lang|grc|θεῖον}}, Greek for "divine", see Theos (disambiguation)

• Edgar Frederik Marie Justin Michiels van Verduynen
• Edgar Fripp Mausoleum, St. Helena Island Parish Church
• Edgar F. Shannon Jr.
• Edgar F. Smith
• Edgar F. Stead
• Edgar Garcia de Dios
• Edgar García
• Edgar Gardner Tobin
• Edgar Gaston Furtado Abraham
• Edgar G. Davies
• Edgar George Holt
• Edgar Gerardo Lugo
• Edgar Gerhart
• Edgar Gess
• Edgar G. Gonzalez
• Edgar Gibson
• Edgar Gilbert
• Edgar Gluck
• Edgar Gonzalez (disambiguation)
• Edgar Gonzalez (infielder)
• Edgar Gonzalez (Mexican footballer)
• Edgar Gonzalez (pitcher)
• Edgar Goodspeed
• Edgar Grierson
• Edgar Grospiron