Willem Alberts Alberda, born in Barradeel on April 4, 1815, son of Albert Willems Alberda and Marijke Ferderiks Reppel.

Willem was married to
Trijntje Ages de Jong, born circa 1816 (?).

• 1 : Marijke Willems Alberda, born in Franekeradeel on March 28, 1839, died in Harlingen on June 8, 1896, aged 57 years.
  Marijke was married in Barradeel on October 14, 1865, at the age of 26 to Willem Jans Rienstra (aged 27 years), born in Franekeradeel on November 1, 1837, son of Jan Sytzes Rienstra and Aaltje Sjoerds Okkes, worker, died in Barradeel on July 3, 1882, aged 44 years.