Agolgut
Agolgut is a narrative entity associated with 
Golgotha, whose "putrid spawn" are apparently a source of glotrot[1] They are venerated by 
glow-wight cultists of Agolgut and 
glow-wight shepherds of Agolgut.
Red Rock
One of Agolgut's glow-wight cultists is guaranteed to spawn in 
Red Rock as part of the quest What's Eating the Watervine? Upon finishing the quest, 
Elder Irudad comments that the glow-wights worship the Girsh Nephilim as gods,[2] which implies that Agolgut is one of the Nephilim (as well as, presumably, Bethsaida).
