| Quellen  | 
- [S10185]  Ancestry.com, Stammbaumindex der Geneanet-Gemeinschaft, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT, USA; Date: 2022;).
 
https://gw.geneanet.org/henglias?n=visser&oc=&p=freerk+thomas 
 
  
- [S10185]  Ancestry.com, Stammbaumindex der Geneanet-Gemeinschaft, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT, USA; Date: 2022;). 
 
  
- [S8976]  Ancestry Family Trees, (Name: Online publication - Provo, UT, USA: Ancestry.com.  Original data:  Family Tree files submitted by Ancestry members.;).
 
Record for Freerk Thomas Visser 
https://search.ancestry.com/cgi-bin/sse.dll?db=1030&h=292167924971&indiv=try 
 
  
- [S8976]  Ancestry Family Trees, (Name: Online publication - Provo, UT, USA: Ancestry.com.  Original data:  Family Tree files submitted by Ancestry members.;).
 
Record for Johanna Jacoba Westerburger 
https://search.ancestry.com/cgi-bin/sse.dll?db=1030&h=1203575822&indiv=try 
  
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