Klaas Piers Wallinga, born in Arum on November 3, 1786, died there in the year 1821, aged 35 years.

Klaas was married in Arum on March 26, 1813, at the age of 26 to
Trijntje Lieuwes Bangma (aged 23 years), born in Pingjum on January 21, 1790, daughter of Lieuwe Rintjes Bangma and Wypkjen Wybes Tilstra, died in Zurich on May 3, 1831, aged 41 years.
Trijntje was married afterwards in Witmarsum on January 20, 1827, at the age of 36 to Ruurd Hobbes Ploegstra (aged 26 years), born in Pingjum on January 31, 1800, son of Hobbe Reinders Ploegstra and Anna Johans Heerpels, died in Almenum on March 26, 1846, aged 46 years.

• 1 : Klaaske Klazes Wallinga, born in Wonseradeel on January 26, 1822, died there on February 29, 1896, aged 74 years.
  Klaaske was married in Wonseradeel on May 4, 1844, at the age of 22 to Eitte Steffens Jorritsma (aged 25 years), born in Wonseradeel on August 29, 1818, died there on March 1, 1878, aged 59 years.