#dutch
Siersma is the maiden name of his wife: Tjalke Koene née Siersma
https://www.openarch.nl/saa:5f13ab1e-e0af-48cc-980f-c7b1ec887123
#dutch
Siersma is the maiden name of his wife: Tjalke Koene née Siersma
https://www.openarch.nl/saa:5f13ab1e-e0af-48cc-980f-c7b1ec887123