Looking for information on parents of John Christian Richter and Charlotte Sophia Eis (Eisen or Eyse).

John was b. 1712 in Saxe-Altenburg d. 1778 Bethlehem, PA.
Charlotte was b. 1723 in Stettin, Prussia d. 1764 Bethlehem, PA
Both came to America from boarding ship Irene in London belonging to their Moravian Church with the John Nitschmann Colony.