- FamilySear
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 22 Jun 2016), entry for Margaret De Courtenay, person ID LC5S-4HX.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 24 Jun 2016), entry for Marguerite Sibylle de Courtenay, person ID 93VW-YD7.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Marguerite Sibylle de Courtenay, person ID 93VW-YD7.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">
- FamilySear
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 22 Jun 2016), entry for Margaret De Courtenay, person ID LC5S-4HX.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 24 Jun 2016), entry for Marguerite Sibylle de Courtenay, person ID 93VW-YD7.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 27 Jun 2016), entry for Marguerite Sibylle de Courtenay, person ID 93VW-YD7.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">