He is married to Jetske Heins van Arkens.
They got married
* Reference: [https://www.myheritage.com/research/record-1-630090021-1-501695/jacob-harmens-kooijenga-in-myheritage-family-trees?indId=externalindividual-dc59157c27e13f09d2261e0031c0edde&mrid=ffc9030804086c55af6384c72c8b155d MyHeritage Family Trees] - [https://www.geni.com/projects/SmartCopy/18783 SmartCopy]: ''Dec 28 2021, 16:51:53 UTC''
Toegevoegd via een Record Match
The Geni Wereld Stamboom kan gevonden worden op http://www.geni.com" target="_blank">www.Geni.com. Geni is eigendom van en wordt uitgevoerd door MyHeritage.