wuldor-geflogena, m.n: a fugitive from glory, an evil spirit.
wæter-egesa, m.n: water-terror.
Image: A siren from The Medieval Bestiary: ‘The siren is a deadly creature, half human, half bird or fish. Early sources say the siren is human (always female) from the head to the navel, and bird from the waist down. Later sources say that the siren is fish from the waist down, like a mermaid. They usually have wings. In some cases sirens are described as having both bird’s feet and a fish tail […]. Sirens charm men with their beautiful singing. Sailors who are attracted to the singing fall asleep; the sirens then attack the men and tear their flesh.’ Definitely sounds like a kind of wæter-egesa!
þyrs, m.n: a giant, an enchanter, a demon. Describes Grendel.
twēo-mann, m.n: a creature about which it is doubtful whether it is human.
mearc-stapa, m.n: one who wanders about the desolate mark or border-land (like Grendel).
fīfel-cyn, n.n: a monster/giant race or kind.
ēoton-weard, f.n: protection against giants.
nicor, m.n: hippopotamus? water-monster? — no one really knows!
Icelandic ‘nykr’ is ‘sea-goblin’. Old High German ‘nichus’ is ‘crocodile’. #OEWater
werewulf, m.n: a werewolf (lit. man-wolf).
Image: Detail of a miniature of two werewolves: the cursed husband on the left, and the priest administering last rites to the dying wife on the right; from Gerald of Wales, Topographica Hibernica, England (perhaps Lincoln), c. 1196-1223, Royal MS 13 B. viii, f. 18r – more info.