Easton's Bible Dictionary (1897)
Raven, a prince of Midian, who, being defeated by Gideon and put to straits, was slain along with Zeeb (Judg. 7:20-25). Many of the Midianites perished along with him (Ps. 83:9; Isa. 10:26).
Smith's Bible Dictionary (1863)
(raven), one of the chieftains of the Midianite host which invaded Israel, and was defeated and driven back by Gideon. ) Isaiah, (Isaiah 10:26) refers to the magnitude of this disaster. Comp. (Psalms 83:1) ...
Hastings' Dictionary of the Bible (1898)
O'REB (raven), a prince of Midian defeated and driven back by Gideon. Jud 7:25. His fate is alluded to in Ps 83:11 and Isa 10:26.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
O'REB (raven). The "rock of Oreb" was named after Oreb, one of the princes of Midian, whom the men of Ephraim slew. Jud 7:25; Isa 10:26. Reland and others would locate Oreb east of the Jordan and in the neighborhood of Bethshean, at a place called Orbo. It appears from Jud 8:4 that Gideon crossed the river in pursuit of the kings of Midian. Hence, Condor formerly suggested that the Midianite leaders were executed on the west side of the Jordan and their heads carried to Gideon, on the other side, and that the rock Oreb was at Ash el-Ghorah. " - Palestine Quarterly, July, 1874, p. 184.
In the Handbook of the Bible, however, he appears to have abandoned this identification, which leaves that of Reland as the only probable location of Oreb suggested.
Hitchcock's Bible Names (1869)
a raven