On August 18, 1811, when Napoleon Bonaparte decreed the civil registry, the three brothers adopted the 'Plantinga' surname on account of their background as gardeners ("Planters").
Pieter Klazes married Gertje Cornelis Prosé (February 12, 1823 - December 18, 1891) from Bergum in Tietjerkstradeel on October 19, 1845.