Descendants of Jacob Cornelisz BLOK and Guurtjr Gerrits KEIJZER
 Fifth Generation 
5. Jan GROEN (Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1) was born in 1817 in Krommenie, , Noord-Holland, Netherlands.1
Jan married Lijsbeth DEKKER, daughter of Gerrit Pietersz DEKKER and Duifje KOK, on July 6, 1845 in Krommenie, , Noord-Holland, Netherlands.1 Lijsbeth was born in 1816 in Krommenie, , Noord-Holland, Netherlands.1
Children from this marriage were:
+ 10 i. Gerrit GROEN was born on March 27, 1848 in Krommenie, , Noord-Holland, Netherlands3 and died on February 14, 1918 in , , , Portugal2 at age 69.
+ 11 ii. Duifje GROEN was born in 1855 in Krommenie, , Noord-Holland, Netherlands.3
12 iii. Jacob GROEN was born in 1860 in Krommenie, , Noord-Holland, Netherlands.3
Jacob married Antje OVERDIJK, daughter of Klaas OVERDIJK and Aagie VOSTER, on August 22, 1886 in Krommenie, , Noord-Holland, Netherlands.3 Antje was born in 1862 in Westzaan, Zaanstad , Noord-Holland, Netherlands.3
7. Maartje Jacobs GROEN (Aagje Gerritsd DAL4, Marijtje Jans BLOK3, Jan Jacobs2, Jacob Cornelisz1) was born in 1821 in Krommenie, , Noord-Holland, Netherlands1 and died on March 9, 1882 in Egmond aan Zee, , Noord-Holland, Netherlands at age 61.
Maartje married Cornelis Cornelisz van der PLAS, son of Cornelis Cornelisz van der PLAS and Trijntje Baarts BAK, on October 28, 1849 in Egmond aan Zee, , Noord-Holland, Netherlands.1 Cornelis was born in 1812 in Egmond aan Zee, , Noord-Holland, Netherlands, was christened on April 12, 1812 in Egmond aan Zee, , Noord-Holland, Netherlands,4 and died on March 22, 1875 in Egmond aan Zee, , Noord-Holland, Netherlands4 at age 63.
Events
• He worked as a Scheepstimmerman or Ships Carpenter.
Children from this marriage were:
+ 13 i. Jacob van der PLAS was born on July 16, 1850 in Egmond aan Zee, , Noord-Holland, Netherlands1 and died on February 8, 1910 in Velsen, , Noord-Holland, Netherlands at age 59.
14 ii. Aagje van der PLAS was born on December 26, 1851 in Egmond aan Zee, , Noord-Holland, Netherlands1,2 and died on February 27, 1936 in Egmond aan Zee, , Noord-Holland, Netherlands2 at age 84.
Aagje married Jan van der PLAS, son of Jan van der PLAS and Aagie ZWART, on July 5, 1884 in Egmond aan Zee, , Noord-Holland, Netherlands.1 Jan was born on November 17, 1852 in Egmond aan Zee, , Noord-Holland, Netherlands1,2 and died on February 18, 1930 in Egmond aan Zee, , Noord-Holland, Netherlands2 at age 77. They had no children.
+ 15 iii. Jan Cornelisz van der PLAS was born on September 7, 1853 in Egmond aan Zee, , Noord-Holland, Netherlands1,5 and died on January 28, 1922 in Egmond aan Zee, , Noord-Holland, Netherlands at age 68.
+ 16 iv. Maartje van der PLAS was born on March 31, 1855 in Egmond aan Zee, , Noord-Holland, Netherlands1 and died on June 22, 1926 in Egmond aan Zee, , Noord-Holland, Netherlands2 at age 71.
+ 17 v. Arie van der PLAS was born on December 1, 1857 in Egmond aan Zee, , Noord-Holland, Netherlands2 and died on April 10, 1922 in Velsen, , Noord-Holland, Netherlands at age 64.
+ 18 vi. Gerrit van der PLAS was born on July 21, 1859 in Egmond aan Zee, , Noord-Holland, Netherlands1 and died on August 2, 1943 in Groningen, , Groningen, Netherlands2 at age 84.
+ 19 vii. Dirk van der PLAS was born on December 20, 1862 in Egmond aan Zee, , Noord-Holland, Netherlands1 and died on January 26, 1937 in Velsen, , Noord-Holland, Netherlands2 at age 74.
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