Descendants of Jan & Antje ZWAKMAN
 Second Generation 
2. Neeltje ZWAKMAN (Jan Cornelisz1) was born about 1763 in Warmenhuizen, , Noord-Holland, Netherlands3 and died on December 30, 1806 in Warmenhuizen, , Noord-Holland, Netherlands3 about age 43.
Neeltje's connection to Jan Cornelisz ZWAAKMAN is not proven but DNA matches inply that this is possible as do the proximity of her age and birth place.
Neeltje married Jan Pietersz de GRAAF, son of Pieter Pietersz de GRAAF and Aaltje OUDES, on April 12, 1788 in Warmenhuizen, , Noord-Holland, Netherlands.3 Jan was born on February 16, 1755 in Zuid-Scharwoude, , Noord-Holland, Netherlands3 and died on September 30, 1803 in Warmenhuizen, , Noord-Holland, Netherlands3 at age 48.
Children from this marriage were:
4 i. Aaltje de GRAAF was born on August 8, 1790 in Schoorldam, , Noord-Holland, Netherlands4 and died on February 19, 1791 in Warmenhuizen, , Noord-Holland, Netherlands.
+ 5 ii. Jacob Jansz de GRAAF was born on October 8, 1791 in Warmenhuizen, , Noord-Holland, Netherlands3 and died on February 24, 1874 in Warmenhuizen, , Noord-Holland, Netherlands3 at age 82.
6 iii. Aaltje de GRAAF was born on December 16, 1792 in Warmenhuizen, , Noord-Holland, Netherlands4 and died before February 1799 in Warmenhuizen, , Noord-Holland, Netherlands.4
7 iv. Maarten de GRAAF was born on February 25, 1795 in Warmenhuizen, , Noord-Holland, Netherlands4 and died after December 1806 in Warmenhuizen, , Noord-Holland, Netherlands.
+ 8 v. Cornelis Pietersz de GRAAF was born on January 13, 1796 in Winkel, , Noord-Holland, Netherlands4 and died on March 14, 1886 in Winkel, , Noord-Holland, Netherlands4 at age 90.
3. Sijmon Jansz ZWAKMAN (Jan Cornelisz1) was born on August 5, 1769 in Schoorl, , Noord-Holland, Netherlands1 and died on September 1, 1861 in Schoorl, , Noord-Holland, Netherlands2 at age 92.
Sijmon married Cornelia HOGENDONK, daughter of Sijmon HOGENDONK and Cornelia Ariensd BEEK. Cornelia was born in 1775 in Hardingxveld, , Zuid-Holland, Netherlands, was christened on December 31, 1775 in Hardingxveld, , Zuid-Holland, Netherlands,1 and died on February 5, 1807 in Schoorl, , Noord-Holland, Netherlands2 at age 32.
Children from this marriage were:
+ 9 i. Simon ZWAKMAN was born on August 24, 1801 in Groet, Schoorl, Noord-Holland, Netherlands2 and died on April 8, 1871 in Aagtdorp, Schoorl, Noord-Holland, Netherlands2 at age 69.
+ 10 ii. Jan ZWAKMAN was born on February 21, 1804 in Groet, Schoorl, Noord-Holland, Netherlands,1 was christened on February 26, 1804 in Groet, Schoorl, Noord-Holland, Netherlands,1 and died on October 7, 1829 in Schoorl, , Noord-Holland, Netherlands at age 25.
11 iii. Cornelia ZWAKMAN was christened on November 30, 1806 in Schoorl, , Noord-Holland, Netherlands2 and died on February 24, 1807 in Schoorl, , Noord-Holland, Netherlands.2
Sijmon next married Anna Catharina VERGERS, daughter of Frans VERGERS and Geertruij van BERTENHOF, on November 24, 1816 in Schoorl, , Noord-Holland, Netherlands.2 Anna was born on August 20, 1774 in Haarlem, , Noord-Holland, Netherlands,1 was christened on August 24, 1774 in Haarlem, , Noord-Holland, Netherlands,1 and died on December 26, 1857 in Schoorl, , Noord-Holland, Netherlands2 at age 83.
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