The Hebrew text has "Jeconiah," which is a variation of the name "Jehoiachin." Many modern versions have "Jehoiachin" in order to make it clear that the same king is being referred to.
Jeremiah gave the scroll to Elasah so that Elasah could take it to Babylon. The reader should understand that Elasah probably put the scroll in a container to keep it safe as he traveled. (See: [[rc://en/ta/man/translate/figs-synecdoche]])
# Elasah ... Shapan ... Gemariah ... Hilkiah
These are the names of men. (See: [[rc://en/ta/man/translate/translate-names]])