Steve

You can find it in ORA Lisse though. When you look up ORA Lisse 4/108 dd 08-04-1613, you'll find the heirs to Claes Willemsz en Annetge Meeusdr. Among them are the children of Pieter Claes Willemszz.

In ORA Lisse 1/163 dd 27-07-1586, you'll find Maertge Cornelisdr widow of Pieter Claesz, assisted by her brother Willem Cornelisz Keijser. From this it is assumed that they (Maertge and Willem) were the children of Cornelis Willemsz Keijser, who only is mentioned in the 10e penning van Lisse 1544. 

Regards, Frans