Petrus Kornelis Steensma, born circa 1778, teacher.

Petrus was married to
Janke Baukes Poelstra, born circa 1783 (?).

• 1 : Albertus Hendrikus Steensma, born in Deinum on March 21, 1806, christened there on April 13, 1806, gardener, pedlar and shopkeeper, died in Jorwerd on January 10, 1874, aged 67 years.
  Albertus was married in Menaldumadeel on February 23, 1831, at the age of 24 to Korneliske Cornelis Feenstra (aged 21 years), born in Oosterlittens on April 7, 1809, christened there on July 16, 1809, daughter of Cornelis Pieters (schuitevoerder, schuitevoerder and schuitevoerder) and Baukjen Ruurds (woman worker), died in Jorwerd on March 8, 1863, aged 53 years.