- Document ID: 9688077
- Document Collection: 1.1.5.7 Nummern-Namen-Kartei Buchenwald (Maenner)
- Link to Online Archive: https://collections.arolsen-archives.org/de/document/9688077
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#dutch
https://www.oorlogsbronnen.nl/tijdlijn/Bertus-Niesing/02/109838
#neuengamme
Mother: Clasina Bastiaan
Clasina Bastiaan (1898 - d.) - Genealogy (geni.com)
Father: Hendrik Jan Niesing