Web: Netherlands, GenealogieOnline Trees Index, 1000-2015
People: Jan Spenkelink, Berend Spenkelink, Fenneken Spenkelink and 7 others.
loes.ged
People: Jeffrey William Voortman, Johanna Theresia Gesina Zwijnenberg, Private and 80 others.
Netherlands, Death Index, 1795-1969
People: Gerrit Voortman, Maria Voortman, Bernardus Johannes Zwijnenberg and 128 others.
FamilySearch Stamboom
People: Albert Jan Nokkert, Gerrit Jan Nokkert (Nukkert), Arendina Catariena Holthuis and 274 others.
Voortman Web Site
People: Private, Private, Bernardus Johannes Zwijnenberg and 281 others.
Meyer Web Site
People: Johanna Spenkelink