Ronja obviously has two independant sources:
- According to the
Astrid Lindgren biography by
Sybil Gräfin Schönfeldt, Lindgren took the name from a map of northern Sweden, there it is a mountain called AnRONJAkåtan.
- In Russia Ronja is a pet form either of
Weronika or of
Roxana.
It looks like Mrs. Lindgren was not aware of this.
Andy ;—)