Good morning again,
I took the opportunity to check my datas again on this subject and found several Engaus in Darmstadt but no one fits into thje dates you gave. On the other hand, there is a certain Johann Heinrich Engau * 1678, + 7.9.1749 being married to a Maria Rebecka Elisabeth Leisler.A certain Leisler was one of the first guys to immigrate to New York. I forgot the role he played there but remember that he was beheaded by the officials. Might be that he was a relative to the Maria and therefor gives the connection to Karl to go oversee to the US. But again: There does exist no Engau at present in Darmstadt and the names I have don´t fit to Kar. The only p
ossible ancestor who might be the father of another Karl E. is a certain Johann Philipp Engau * 10.10.1724. As I have no datas of any marriage or his death I cat help you there. Again, the only Karl fitting more or less to the datas you gave ist the one I mentioned yesterday. He is the son of Christian Wilhelm Lorenz Engau * 30.9.1798 , + 20.1.1829. If you want to contact me please be so kind as to do it under my e-mail adress :
hans-volker.Kurstedt@helaba.deRegards - Hans-Volker Kurstedt