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The name of three different places in the Bible…
A town in the valley or lowland of Judah; formerly a royal city of the Canaanites (Joshua 12:17; 15:34). It is now called Tuffuh, about 12 miles west of Jerusalem.
A town on the border of Ephraim (Joshua 16:8). The “land” of Tappuah fell to Manasseh, but the “city” to Ephraim (17:8).
En-tappuah, the well of the apple, probably one of the springs near Yassuf (Joshua 17:7).