There is a Margrieta Dyckman that was the daughter of Johannes and Engeljte. She was born about 1717/18 at Livingston Manor, Albany (Columbia) County, New York. Died after 15 November 1775. Married about 1739 Hartmen Van Deusen. I think this is the one you are related to. If you are able to contact Marjorie Chamberalin please let me know as I would like to belong to an organization called The Dyckman/Dikeman/Dykman Family Association.