- FamilySear
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 10 Jun 2016), entry for Hildegonde De Cologne, person ID LKJB-H2Y.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 8 Sep 2016), entry for Hildegonde de Cologne, person ID LKSK-2D4.
» 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 10 Jun 2016), entry for Hildegonde De Cologne, person ID LKJB-H2Y.
- FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 8 Sep 2016), entry for Hildegonde de Cologne, person ID LKSK-2D4.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">