GEMARIAH (gĕm'a-rī'a, Jehovah has fulfilled, or, accomplishment of the Lord)
A prince, son of Shaphan the scribe and brother of Ahikam (Jer.36.10-Jer.36.25). This scribe with others sought in vain to keep King Jehoiakim from burning the roll that Baruch had written at the dictation of Jeremiah.A son of Hilkiah, sent by King Zedekiah as ambassador to Nebuchadnezzar at Babylon. He also carried a letter from Jeremiah to the captive Jews (Jer.29.3).
GEMARIAH gĕm’ ə rī’ ə (Heb. and Aram. גְּמַרְיָ֖ה), a proper name used from the time of the monarchy known to apply to at least four individuals. The name is apparently understood as, “Jehovah has brought to pass.” 1. A son of a certain Hilkiah, and an emissary to Nebuchadnezzar from King Zedekiah who carried Jeremiah’s message to the captive Jews (Jer 29:3).
2. A son of Shaphan the scribe. It was in his chamber in the Temple that Baruch read the scroll of Jeremiah to the people. When his son, Micaiah, brought in the news of the reading and the princes and officials sent for the scroll to be read, Gemariah with several others remonstrated with King Jehoiakim when he hacked off pieces of the scroll and burned them (Jer 36:10-12, 25).
3. A son of a certain Hissilyahu mentioned in Lachish Ostracon I, a potsherd written during the era of Jeremiah.
4. An official of the Jewish military colony at Egypt. Elephantine, he is mentioned in two of the Aram. papyri (Cowley 22, 33) as the son of a certain Yedoniah.
International Standard Bible Encyclopedia (1915)
(gemaryahu, gemaryah, "Yahweh hath accomplished"):
(1) Son of Shaphan the scribe, one of the princes, from whose chamber Baruch read Jeremiah’s prophecies to the people. He, with others, sought to stay Jehoiakim from burning the roll (Jer 36:10,11,12,25).
(2) Son of Hilkiah, one of Zedekiah’s ambassadors to Babylon, by whom Jeremiah sent his letter to the captives (Jer 29:3).