Descendants of Jacob Cornelisz BLOK and Guurtjr Gerrits KEIJZER
 Ninth Generation 
101. William La FLEUR ... DNA (Cornelia Johanna van der PLAS66, Cornelis van der PLAS27, Jacob van der PLAS13, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
William married someone.
His child was:
+ 122 i. Jennifer La FLEUR ... DNA
103. Willem NAT ... DNA (Nicolaas Cornelis NAT70, Marie van der PLAS28, Jacob van der PLAS13, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Willem married Pieternella Trijntje van SOMEREN.
Children from this marriage were:
123 i. Willem NAT
Willem married Claudina Anna Hendrika BURM.
124 ii. Belinda NAT
Belinda married Alexander Edwin de HOSSON.
125 iii. Nico NAT
Nico married Ilona VISSER.
104. Maria Catharina "Ria" de BOER (Ytje Alberts "Ida" JANSMA77, Maria Catharina van der PLAS35, Jan Cornelisz van der PLAS15, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Ria married Abraham "Bram" RIJBROEK, son of Abraham Lucas Anthonius Lucas RIJBROEK and Louise Johanna BOUWMAN.
Children from this marriage were:
126 i. Anna-Marike RIJBROEK
Anna-Marike married Peter van ARKEL.
127 ii. Marlies Ideke RIJBROEK
Marlies married Herman Johannes van den BOLD.
105. (__?__) van der HAM (Neeltje JANSMA78, Maria Catharina van der PLAS35, Jan Cornelisz van der PLAS15, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1).
(__?__) married Herman SAVELKOEL, son of Herman SAVELKOEL and Anna (__?__). Herman was born on April 5, 1938 in Deventer, , Overijssel, Netherlands and died on June 27, 2018 in Drachten, , Friesland, Netherlands at age 80.
The child from this marriage was:
128 i. Monique SAVELKOEL ... DNA
106. Cornelis Jan "Case" VANDERPLAS (Jan Cornelis "John" van der PLAS79, Cornelis Jan "Cor" van der PLAS36, Jan Cornelisz van der PLAS15, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Case married Katherine Louise WATSON, daughter of John Marshall "Jack" WATSON and Florence Mae METCALFE.
Children from this marriage were:
129 i. Kristine Mae VANDERPLAS
Kristine married Kelly David KENNEDY, son of Richard Earl "Dick" KENNEDY and Judith Ann ZIMMER.
130 ii. Robert John Cornelis VANDERPLAS
109. Cornelis Ferdinand "Bob" VOLKERS (Marie Nelli Johanna "Miep" van der PLAS80, Cornelis Jan "Cor" van der PLAS36, Jan Cornelisz van der PLAS15, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Bob married Lammechien Jantina Catharina "Inez" VORENKAMP.
The child from this marriage was:
+ 131 i. Nicole Aimee VOLKERS
110. Jeanette van DIEPEN (Marie Nelli Johanna "Miep" van der PLAS80, Cornelis Jan "Cor" van der PLAS36, Jan Cornelisz van der PLAS15, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Jeanette had a child.
Her child was:
132 i. Martijn van DIEPEN
Jeanette next married Frank P. WALRAVEN, son of Pieter WALRAVEN. Frank was born in 1968 in , , , Netherlands and died on September 22, 2021 at age 53.
111. Catharina Eliz. "Kitty" NIEMANN (Jan Willem NIEMANN82, Catharina C. van der PLAS37, Jan Cornelisz van der PLAS15, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Kitty married Conrad Lionel CHAMBERS, son of Roy Edwin Medcalf CHAMBERS and Elsa L'AMBRICHE.
Children from this marriage were:
133 i. Luke William NIEMANN
+ 134 ii. John Theophilus NIEMANN
114. Son van der PLAS (Arie van der PLAS94, Cornelis Arend van der PLAS49, Arie van der PLAS17, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Son married someone.
His child was:
135 i. Alex van der PLAS ... DNA
115. Henrika "Rineke" van der PLAS (Cornelis van der PLAS95, Cornelis Arend van der PLAS49, Arie van der PLAS17, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Rineke married Ronald BIJSTER, son of Jelle BIJSTER and Betty PATER.
Children from this marriage were:
136 i. Sven BIJSTER ... DNA
137 ii. Ralf BIJSTER
120. Son BERGSMA (Elizabeth Jacoba Alida van der PLAS96, Jacobus van der PLAS51, Gerrit van der PLAS18, Maartje Jacobs GROEN7, Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1)
Son married someone.
His child was:
138 i. Rinke BERGSMA ... DNA
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