This is indeed the Claes Dierkx i was looking for. The birht date i had was calculated back from his death certificate so there can be a year difference. I would appreciate it if you could send me the source of the information so we can continue to look further. On the Catharina Dierkx i have no further information. I heard on the news that she will be proclamed holy in a few days. It seems she was beheaded in an orphanage China during the Boxer wars. My mother told me that she saw a painting of her a couple of years ago in the Museum Cathareine Convent in Utrecht.