One thing it's not is the "West Bank"

A "bank" of a river is defined from the north and so "left" is to the east and "right" is in the west. Here:

The descriptive terms "right bank" and "left bank" are relative to an observer looking downstream, in which the right bank is to the observer's right, and vice versa.

And, by the way,

BANKS OF RIVERS, estates.
By this term is understood what retains the river in its natural channel, when there is the greatest flow of water.

That is, to call the territory of the highlands of Samaria and Judea the "West Bank" is incorrect and actually, plain silly.