Can anyone tell me the correct pronunciation of Bodhran, please?

I have always pronounced it bo run with a long o sound as in 'so' and the stress on the first syllable but last night I heard it pronounced with the o as in cow, bough-run.

Which is correct? Or is it something different entirely?

The irony of it is that my mother was a native Irish speaker; they spoke only Irish at home and English everywhere else but her grandmother spoke only Irish and never managed to get her tongue round the 'heathen English'. I can't ask my mother's help though as she has been dead for many years and she never spoke Irish in front of us children so we didn't learn to speak that lovely language. Isn't that a shame?