He is married to Aafke Pieters Kroos.
Permission for the marriage has been obtained in Tietjerksteradeel (Tietjerksteradeel) (Friesland) on July 13, 1850.Source 2
They got married on July 13, 1850 at Tietjerksteradeel (Tietjerksteradeel) (Friesland), he was 34 years old.Source 4Child(ren):
Johannes Jans van der Zwaag | |||||||||||||||||||||||||||||||||||||
1850 | |||||||||||||||||||||||||||||||||||||
Aafke Pieters Kroos |
Geboorteakte Aktenr. A 33
Tresoar, Frysk Histoarysk en Letterkundich Sintrum
http://www.genealogieonline.nl/stamboom-weening/I34625.php
Huwelijksakte Toeg.nr. 30-37 Inv.nr. 2016 Aktenr. 61