- FamilySearch
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 28 Jun 2016), entry for Johan Isaak Vermaak, person ID KCYM-9Q7.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 28 Jun 2016), entry for Johan Isaak Vermaak, person ID 2CBR-K17.
» Bronnen » Stamboom M. Tolsma » Genealogie Online">
- FamilySearch
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 28 Jun 2016), entry for Johan Isaak Vermaak, person ID KCYM-9Q7.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 28 Jun 2016), entry for Johan Isaak Vermaak, person ID 2CBR-K17.
» Bronnen » Stamboom M. Tolsma » Genealogie Online">