Dead who did not settle, and living people who became something else. The classification turns on how a person died and on whether anyone performed the rites afterwards.
ผีตายโหง
phi tai hong
Died wrong
Killed, or dead suddenly, or dead away from home, and without the rites. The defining property is that they stay. Two stops on this route are made of them: the gate the executions and the corpses went through, and the house in the north-west quarter.
Lanner · Veridian E-Journal, Silpakorn University
ผีพราย
phi phrai
The drowned
Held in the water and, in the telling, able to get out only by putting somebody else in. It is the reason a northern grandmother will not let a child swim at dusk.
Lanner · Veridian E-Journal, Silpakorn University
ผีกะ
phi ka
The one a family inherits
The northern one that has done the most social damage. It lives with a household rather than in a place, and it passes down the mother's line — accounts differ on whether to the eldest daughter or the youngest, and say it depends on the family. It has to be fed. Fed, it leaves the household alone and goes out at night into other people's; neglected, it turns on the house that holds it.
The part that is not folklore is what a village does with the accusation. A house said to carry ผีกะ is a house nobody marries into, and the accusation lands on women.
ศิลปวัฒนธรรม (Silpa-mag) · Lanner
ผีโพง
phi phong
The one with the light in its nose
A living person who took up magic and lost hold of it, or who grew the wan called ว่านผีโพง — white, hot and sharp — which in the telling draws mercury into itself as it ages and starts to glow. They go out over the paddy at night after the slime off frogs, with a white-green light coming out of the nose to find it by. What the story describes, at the flat end of it, is marsh gas over a rice field at night.
Wikipedia (ไทย) · มติชนสุดสัปดาห์
ผีปกกะโหล้ง
phi pok ka long
The one in the deep forest
Lives in thick forest and arrives as a storm, or as an animal, or as a frightening old man whose beard has animals living in it. It is named for the noise it makes, which is the noise it is called.
กรุงเทพธุรกิจ · Lanner
ผีกองกอย
phi kong koi
The one-legged one
A single leg, and it hops. Beyond that the accounts thin out fast, which is worth saying rather than filling in.
กรุงเทพธุรกิจ
ผีนางไม้ · ผีป่า
phi nang mai, phi pa
The tree and the forest
A spirit resident in a particular tree, and the general run of forest spirits. This is why a big tree in Chiang Mai has cloth round it and why a contractor will pay a monk before taking one down.
Lanner · Veridian E-Journal, Silpakorn University