We know that Pieter Adriaansz Coornwinder was an accomplished man, serving both as notaris in Berckel and as bailluw and schout* in Houzerswoude, however, exact dates are not known.  We do not know exactly when he was born but estimate his birth around 1638.  There are archive records in Berckel that show that he served as notaris of Berckel from 1658 until 1670 and there are records in Hazerswoude from 1670 until 1690 that show his title of bailluw and schout.  
We can assume that he moved from Berckel to Hazerswoude in 1670, and that this move coincided with his marriage to Barbara Veenbergen who was the daughter of Hendrik Veenbergen, the bailluw in Hazerswoude.  However, we don't know if he continued to serve past 1690 which could be assumed since he did not die until 1720.   
His wife Barbara died in 1688 the same year as her brother and only a year after her mother.  Pieter must have taken a second wife, whose name is unknown but records show that she died in 1707.
Hazerswoude was a village similar to Berckel, with its first official record dating back to 1281.  The oldest map of Hazerswoude is from 1573 and the map of Hazerswoude from 1610 shows how the village must have looked around the time when Pieter arrived. Hazerswoude suffered from the same water problems as Berckel and its economy was equally affected by the constant flooding of the land (see map of 1750).  Hazerswoude regained the upper hand with the water in 1759, after Pieter's death.
* A bailluw was a function similar to what we would call a mayor today.  A schout was more like a sherif.