He is married to Maria Elisabeth Snouckaert van Schauburg Vrouwe van Spij.
They got married on October 30, 1784 at Scheveningen, Z.H., he was 25 years old.
Child(ren):
Bron: http://nl.wikipedia.org/wiki/Jacob_Derk_Sweerts_de_Landas
en; http://nl.wikipedia.org/wiki/Sweerts_de_Landas
en: http://genealogics.org/getperson.php?personID=I00038863&tree=LEO
The data shown has no sources.