i found this yesterday on a family tree from archives of Bas-Rhin in France ..Jean Frederick Iffland born 1769 -1842 , Parents were Balthabar and Madeleine Iffland ..no dates on them ..there was a link to the archives but i don`t know french so i am lost on it , there are 19 images it says..if you search ( Jean frederick Iffland ) on ancestry you will see it ...I also found on the Tree this person has a Christine Iffland (1749-1834) born in Niederlauterbach , BasRhin , Alsace , France ..it was a marriage record to Jean Michel Iffrig (1727-1834) 6 children in that union , she will show up if you search her here on ancestry .