From BiblePortal Wikipedia

Hastings' Dictionary of the Bible [1]

Harsith . The name of a gate in Jerusalem (  Jeremiah 19:2 RV [Note: Revised Version.] ). RVm [Note: Revised Version margin.] has ‘the gate of potsherds ,’ i.e. where they were thrown out. AV [Note: Authorized Version.] , deriving the word from heres ‘sun,’ has ‘the east gate,’ AVm [Note: Authorized Version margin.] ‘the sun gate.’ This gate led into the Valley of Hinnom.

International Standard Bible Encyclopedia [2]

har´sith ( חרסית , ḥarsı̄th ): One of the gates of Jerusalem ( Jeremiah 19:2 the Revised Version (British and American)); margin suggests "gate of the potsherds"; the King James Version has "east gate" and the King James Version margin "sun gate," both deriving the name from צ , ḥerec , "sun." The gate opened into the valley of Hinnom. See Jerusalem; Potsherd .