Easton's Bible Dictionary (1897)
A little bird, the father of Balak, king of Moab (Num. 22:2, 4).
Smith's Bible Dictionary (1863)
(sparrow), father of Balak king of Moab. (Numbers 22:2,4,10,16; 23:18; Joshua 24:9; Judges 11:25) Whether he was the “former king of Moab” alluded to in (Numbers 21:26) we are not told.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
ZIP'POR (a little bird), the father of Balak, king of Moab. Num 22:2, Ex 6:4, 1 Kgs 16:10, Ex 17:16; Gen 23:18; Josh 24:9; Jud 11:25.
Hitchcock's Bible Names (1869)
bird; sparrow; crown; desert