I have just created the first "Kingslant" family in Wikitree. They are apparently of the New Netherland community in East New Jersey being found, first, in Hackensack in 1725 then moving to Essex County where they attended the Second Dutch Reformed Church in Belleville from about 1728 to after 1741.
This family changed their name to Kingsland, of course, and may be related to the Isaac Kingsland who married Elizabeth Berry: https://www.wikitree.com/wiki/Kingsland-75
However, research on the family of Jan and Marietje (Berry) Kingslant is going slowly for me at the moment.
Any information that will lead to the birthplace of either Jan Kingslant or Marietje Berry/Berri is greatly appreciated.