Mizraim = Egypt, became the name of Egypt = "the two Matsors". One Matsor was country of the Delta within the great wall of defence called "Shur"; the other was Egypt proper. See notes on Isa_19:6 with Isa_37:25.
Phut: compare Jer_46:9. Eze_27:10; Eze_30:5; Eze_38:5. Nah_3:9. Canaan became a province of Egypt, as shown by the Tel el-Amarna tablets.