Pathros

the name generally given to Upper Egypt (the Thebaid of the Greeks), as distinguished from Matsor, or Lower Egypt (Isa 11:11; Jer 44:1 ; 44:15; Ezek 30:14), the two forming Mizraim. After the destruction of Jerusalem by Nebuchadnezzar, colonies of Jews settled "in the country of Pathros" and other parts of Egypt.

EBD - Easton's Bible Dictionary