„The lion is the lion of the County of Jülich, to which the municipality historically belonged. The key is a symbol for St. Peter, patron saint of the village."
Wappen der Gemeinde Boisheim, S.7

http://www.ngw.nl/heraldrywiki/index.php?title=Boisheim
UnknownUnknown  - constructed and added by Jürgen Krause