bourg >

I think 'bodhran' came from the old word 'bourdon,' to wit:

bour·don    (brdn) KEY

NOUN:

The drone pipe of a bagpipe.
The bass string, as of a violin.
An organ stop, commonly of the 16-foot pipes, medium in scale but with dark timbre.

--------------------------------------------------------------------------------
ETYMOLOGY:
Middle English burdoun, bass, from Old French bourdon