FamilySearch Family Tree (
http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 29 Jun 2016), entry for Jacob Theodoor Van Beeck Calkoen, person ID KZFR-7RX. FamilySearch Family Tree (http://www.familysearch.org) - "FamilySearch," database, \i FamilySearch\i0 - The Church of Jesus Christ of Latter-day Saints - accessed 29 Jun 2016), entry for Jacob Theodoor Van Beeck Calkoen, person ID KZFR-7RX.