I found the marriage for Gerrit Slenders from Maarheeze!https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSTQ-L933-Q...
Haarlem 9 april 1797
Gerrit Slenders W[eduw] N[aar] van Maarheijs in de Meijerij van den Bos
Johanna Maria Klaes J[onge] D[ochter] van Haarlem
Interesting to note that this is a card index of DTB records in Haarlem; Gerrit's first marriage is image before the above. Marriage for the other Gerrit is NOT in the card index! The cards appear to be in alphabetical order.