I’m looking for a 60’s era American elementary school level (age range estimate: 7 – 12) hard back novelette about a tribe of proto-human nomads that were still using trees for both transport and dwelling.

I don’t recall much else, except that we follow a young male tribe member as he grows, learns, and takes on responsibilities.

Fuzzy memory suggests the young male’s name is the title of the book.
Something like Aab, Aag,Oog, Oob…maybe.

Ancient memory suggests that it was a good read, so I imagine you’ll have little difficulty finding it.

In grade four, possibly grade five, I found a fascinating book in the school library–which means that it was probably published in the early 1950s. I loved this particular book and have been trying to find it for many years. If this isn’t a stumper, I don’t know what would be.

I don’t remember the title or the author or even the names of characters. All I remember is that the story takes place in Norway during World War II and that the protagonist’s father is the village church’s sexton. (That word, “sexton,” was a new one for me.) I think that this boy saves a Jewish boy from the Nazi invaders (and can’t imagine why else the library of a Jewish school would have a book about Christians in its library).
This book has some illustrations. I remember black-and-white ones.