Johann Christian Orb was born on 12 October 1699 in Leiselheim, Worms, Rheinland-Pfalz, Germany as the first child of Johann Jost Orb and Elisabeth Schmidt.

Johann Christian Orb married Eva Margaretha Küchler, daughter of Johann Dieterich Küchler and Katharina Elisabetha Grun.

Johann Christian Orb and Eva Margaretha Küchler had the following children:

1. Katharina Margaretha Orb was born on 29 May 1740 in Westhofen, Alzey-Worms, Rheinland-Pfalz, Germany. Katharina married Johann Tobias Sponagel . She died on 16 December 1816 in Westhofen, Alzey-Worms, Rheinland-Pfalz, Germany.

Johann Christian Orb married Charlotte Margarethe. They  had no children.

Johann died on 02 September 1777 in Westhofen, Alzey-Worms, Rheinland-Pfalz, Germany.

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