 Hence, Unterjeckenbach's ecclesiastical history is shared with Herren-Sulzbach.Beginning in the late 13th century, the Knights of Saint John held great influence over the Waldgravial-Rhinegravial noble house.Introduced into the lordship of Grumbach in 1556 was the Reformation, and the Evangelical parish of Herren-Sulzbach was founded, to which Unterjeckenbach has belonged ever since.