Hendrik Jans Kuiper, born in Makkum circa 1821, son of Jan Klaazes Kuiper and Grietje Hendriks Bakker.

Hendrik was married in Harlingen on December 12, 1850, at the age of approximately 29 to
Baukje Sikkes Hellingwerf (aged approximately 29 years), born in Makkum circa 1821.

• 1 : Jan Kuiper, born in Makkum on July 4, 1864, tilebaker's hand and barge hand.
  Jan was married in Harlingen on January 27, 1896, at the age of 31 to Neeltje Kroese (aged 31 years), born in Harlingen on September 27, 1864, daughter of Roelof Kroese (grain tallier) and Trijntje Martens.