- FamilySe
- 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 Johanna Sophia Willemse, person ID L6MG-FC8.
- 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 Johanna Sophia Willemse, person ID L69Y-586.
» Les sources » Arbre généalogique M. Tolsma » Généalogie Online">
- FamilySe
- 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 Johanna Sophia Willemse, person ID L6MG-FC8.
- 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 Johanna Sophia Willemse, person ID L69Y-586.
» Les sources » Arbre généalogique M. Tolsma » Généalogie Online">