See Alwyn Smit death date 24 aug 1774, Land van Waveren.
https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSKD-F3XH?i=430&am...
http://www.ballfamilyrecords.co.uk/smit/I003.html notes that one of the couple must have died in 1774 because of their joint will filed btwn Feb and Oct 1774 > so I'm prepared to go with this as a DN, if everybody is happy. Thanks for finding it Marie - Did you upload it?