Also, back then in 1925 infant mortality was probably ~10x worse [0], which adds to how we (today) might underestimate the prevalence of parent-child traumas.
[0] https://data.worldbank.org/indicator/SP.DYN.IMRT.IN?location...
Emil of Lönneberga and The Six Bullerby Children are great books, the rest about traumatized kids/orphans not so much as kid books.
One of parents being dead was way more commom situation then it is today.