Mariane, my Rev JCVL is the son of Johannes VL and Magdalena Wyckoff, sister to your Magdalena.I haven't been able to find him on the 1840 census yet, but I did find him in upstate western NY in 1850.He's back in New Brunswick NJ in 1860, but that's the last I've found him.
I have seen the VL book by Randolph VL, but I didn't know there was another one.Does the one you've seen have information on descendants of Hendrick (b. 1689)?
I'd be interested in sharing information with you, if you'd like.I don't have anything on your Magdalena, except that she was born in 1795 and married Ralph Van Nostrand 12 July 1814.My Rev JCVL, her brother, was born 2 Jan 1807. Their mother, Maritje Vanderbilt, was the daughter of Jeremyas Vanderbilt and Peternella Wyckoff.