Yes you have the name of the first wife - he married Deana Kierulf as you mention in another entry to Falch-forum. Fridrich Falch m. 24 Nov. 1781, Moss (in the Oslo Fjord), Deana Kierulf. It must be so that they married in 81. She must have died before 83, when he married second time. You mention the names of the sponsors at the paptism of the first child in 1784. Eleonora Berg was probably mother or sister to Mathea. From his first wife's family we reckognize Jfr (Jomfru=Virgin) in the meaning Miss Laurentia Kierulf. I am certain that she was a "Jomfru" in 1784. She married Lorents Pettersen in Moss 29 aug 1795.