What is "oecumenius"

Oecumenius , once believed to be a Bishop of Trikka (now Trikala) in Thessaly writing about 990 (according to Cave, Scriptorum eccles. hist. liter. (Basel, 1745), p. 112), was reputed to be the author of several commentaries on books of the New Testament. However, more recently scholars have redated Oecumenius' Commentary on the Apocalypse to the early seventh century, or the late sixth century, and have located Oecumenius as writing in Asia Minor.