Etham

perhaps another name for Khetam, or "fortress," on the Shur or
great wall of Egypt, which extended from the Mediterranean to
the Gulf of Suez. Here the Israelites made their third
encampment (Ex. 13:20; Num. 33:6). The camp was probably a
little to the west of the modern town of Ismailia. Here the
Israelites were commanded to change their route (Ex. 14:2), and
"turn" towards the south, and encamp before Pi-hahiroth. (See
EXODUS T0001283; PITHOM T0002968.)