My last offically issued Army dog tags list my religion as “Druid.”
Somewhere along the line (and years ago) I read that “druid” is a transliteration of the term “daru vid”, which translates “to know the oak”. :’)
http://www.visionofbritain.org.uk/text/chap_page.jsp;jsessionid=6BC8A2170818A1C696BA8354A271D4CD?t_id=Borrow&c_id=36&cpub_id=0
“Derw, an oak; Daru, timber”