But I got lucky today. I was trying to pry Sjoerd Sybes Veeman's parents out of a death record in the civil registry, and I was having trouble reading his mother's patronymic (first name was obviously Pietje). Sheer dumb luck handed me his parents' marriage record in tresoar, and I knew it was the right people (Boksum? In that decade? Not likely to be two of them), and Pietje's patronymic made sense of the handwriting (Rinnerts -- I was not going to figure that one out on my own).
This is weirdly fun. Pietje is my great-great-great-great-great-grandmothe