Mike's theory checks out via this source, too
in reply to a message by Daividh
From *The Classic 1000 Baby Names* (Foulsham of London, c1993):
Berengaria (Teutonic) "Spearer of bears".
Berengar (Teutonic) "Bear, spear".
-- Nanaea
Berengaria (Teutonic) "Spearer of bears".
Berengar (Teutonic) "Bear, spear".
-- Nanaea