Pieter COSTER

Pieter's father was Symon Jans COSTER and his mother was Eefgen AERTS.  His maternal grandfather was Aert Pietersz EEFGEN. He had two brothers and five sisters, and also two siblings of unknown gender, named Jan Sijmens, Pieter, Annetje, Marritje, Marritje, Neeltje, Neeltje, Aert and Aert.