I have seen reference to a Gabriel Marselis and Maria Pipearts. But due to the naming pattern I see with Hendrick's descendants I am skeptical.It also links Jan Marselis, Pieter Marselis and Hendrick as siblings. Pieter I doubt but Jan seems possible. See my earlier post.
I think if you go to Houghtaling website by Shepard he cites part of this. I believe his is a very creditable effort by the way muc seems to jive with my own understandings.
by the way I assume you come by way Houhtaling? Else we have found the unnamed siser to Maria Hendrickse, daughter of Hendrick.