Easton's Bible Dictionary (1897)
The central mountainous district of Palestine occupied by the tribe of Ephraim (Josh. 17:15; 19:50; 20:7), extending from Bethel to the plain of Jezreel. In Joshua’s time (Josh. 17:18) these hills were densely wooded. They were intersected by well-watered, fertile valleys, referred to in Jer. 50:19. Joshua was buried at Timnath-heres among the mountains of Ephraim, on the north side of the hill of Gaash (Judg. 2:9). This region is also called the “mountains of Israel” (Josh. 11:21) and the “mountains of Samaria” (Jer. 31:5, 6: Amos 3:9).
Smith's Bible Dictionary (1863)
is a district which seems to extend as far south as Ramah and Bethel, (1 Samuel 1:1; 7:17; 2 Chronicles 13:4,19) compared with 2Chr 15:8 Places but a few miles north of Jerusalem, and within the limits of Benjamin.