The existence of this person is unclear as the combination of their first name and age don't immediately make sense. They're mentioned in the death record for their sibling Marijnus/Marinus Huijbregts as their 46-year-old brother. However, the only brother of that age at that time is Wilhelmus. A brother Petrus/Pieter exists, but at 66 he is 20 years older than the death record states.