Kitto's Popular Cyclopedia of Biblial Literature
Joha´nan (God-bestowed); one of the officers who came and recognized Gedaliah as governor of Judea after the destruction of Jerusalem, and who appears to have been the chief in authority and influence among them. He penetrated the designs of Ishmael against the governor, whom he endeavored, without success, to put upon his guard. When Ishmael had accomplished his design by the murder of Gedaliah, and was carrying away the principal persons at the seat of government as captives to the Ammonites, Johanan pursued him, and released them. Being fearful, however, that the Chaldeans might misunderstand the affair, and make him and those who were with him responsible for it, he resolved to withdraw for safety into Egypt, with the principal persons of the remnant left in the land. Jeremiah remonstrated against this decision; but Johanan would not be moved, and even constrained the prophet himself to go with them. They proceeded to Taphanes, but nothing further is recorded of Johanan. B.C. 588 (;; to ).
Kitto, John, ed. Entry for 'Johanan'. "Kitto's Popular Cyclopedia of Biblial Literature". https://www.studylight.org/encyclopedias/eng/kbe/j/johanan.html.