Hobbe Reinders Ploegstra, born in Pingjum circa 1760, died there in March 1820, aged approximately 60 years.

Hobbe was married to
Anna Johans Heerpels, born in Cornwerd on December 10, 1765, died in Pingjum in December 1810, aged 45 years.

• 1 : Ruurd Hobbes Ploegstra, born in Pingjum on January 31, 1800, died in Almenum on March 26, 1846, aged 46 years.
  Ruurd was married in Witmarsum on January 20, 1827, at the age of 26 to Trijntje Lieuwes Bangma (aged 36 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 before in Arum on March 26, 1813, at the age of 23 to Klaas Piers Wallinga (aged 26 years), born in Arum on November 3, 1786, died there in the year 1821, aged 35 years.