Meaning
The Beth-dagon of Josh 15:41 was one of the cities of the tribe of Judah, in the lowland or plain which stretches westward. It has not been identified.
The Beth-dagon of Josh 19:27 was one of the border cities of Asher.
That of 1Chr 10:10 was in the western half-tribe of Manasseh, where the Philistines, after their victory at Gilboa, placed Saul's head in the temple of their god. (Comp. 1Sam 31:8-13).