Eilders/van Wijngaarden family tree [Onderzoek in Nederland]

Yes, it is very strange. The adoption papers were signed the day before they were married. I see that the date of the engagement announcement added above, he was only 4 months old. The story goes that his parents would collect him from the orphanage if they ever married, but obviously, this wasn't the case :( There are handwritten letters between a family member and his adoptive parents, so people knew about him. I am trying to work out who that was, as the lady who signed the letter w