- 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 Theodore 1 Lascaris Emperor Byzantine Empire, person ID LCXN-PSG.
- 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 Theodore 1 Lascaris Emperor Byzantine Empire, person ID LCXN-PSG.
- 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 Theodore 1 Lascaris Emperor Byzantine Empire, person ID LCXN-PSG.
» Les sources » Arbre généalogique M. Tolsma » Généalogie Online">
- 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 Theodore 1 Lascaris Emperor Byzantine Empire, person ID LCXN-PSG.
- 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 Theodore 1 Lascaris Emperor Byzantine Empire, person ID LCXN-PSG.
- 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 Theodore 1 Lascaris Emperor Byzantine Empire, person ID LCXN-PSG.
» Les sources » Arbre généalogique M. Tolsma » Généalogie Online">