Johanna Koster, born circa 1771 (?), died after October 12, 1837, aged at least 66 years.

Johanna was married to
Philippus Geelof, born in Nassau Dietz circa 1753, bricklayer, died in Leeuwarden on July 29, 1814, aged approximately 61 years.

• 1 : Johannes Geelof, born in Leeuwarden on June 30, 1794, christened there on August 31, 1794, knitter, dock hand, innkeeper, publican, shopkeeper and publican, died in Harlingen on March 22, 1869, aged 74 years.
  Johannes was married (1) to Janke Willems Haquebart, born circa 1762 (?), died in Harlingen on January 4, 1834, aged approximately 72 years.
  Johannes was married in Harlingen on October 12, 1837, at the age of 43 (2) to Ybeltje Hendriks Rinsma (aged 38 years), born in Harlingen on December 7, 1798, daughter of Hendrik Jetzes (workman) and Jenne Jans, died in Harlingen on February 22, 1840, aged 41 years.
  Ybeltje was married before in Harlingen on April 11, 1833, at the age of 34 to Sierk Sierks Posthumus (aged approximately 45 years), born circa 1788, died in Harlingen on November 20, 1836, aged approximately 48 years.
  Johannes was married in Harlingen on October 29, 1840, at the age of 46 (3) to Hendrikje Pieters Hanzen (aged 27 years), born in Harlingen on February 13, 1813, daughter of N.N. and Arriaantje Bakker, died there on February 28, 1879, aged 66 years.
  Hendrikje was married at the same time in Harlingen on August 25, 1836, at the age of 23 (1) to Barend Adriaans Westerhout (aged 36 years), born in Hoorn on April 29, 1800, christened there on April 30, 1800, son of Adriaan Jansz Westerhout (fisherman) and Dina Barendze Sijnen, sailor and fisherman, died in Harlingen on April 27, 1837, aged 36 years. Hendrikje was married at the same time after August 26, 1836, at the age of at least 23 (2) to N.N. (aged at least 24 years), born circa 1812 (?).