- FamilyS
- 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 Cornelis Janssen Lourens, person ID K4GZ-5LX.
- 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 Cornelis Petrus Lourens, person ID L72V-RH6.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">
- FamilyS
- 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 Cornelis Janssen Lourens, person ID K4GZ-5LX.
- 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 Cornelis Petrus Lourens, person ID L72V-RH6.
» Quellen » Familienstammbaum M. Tolsma » Genealogie Online">