Pieter Alderts, born in Uithuizermeeden on April 3, 1722, son of Allert Wijbrants and Wibke Pieters.

He was married in Uithuizermeeden on November 18, 1764 to
Martje Harms, born in Uithuizermeeden, christened there on November 24, 1743, daughter of Harm Cornelis and Jantjen Jans.