Aodh on it's own is proounced 'ay' in bay (The anglicisation is
Hugh). án is awn. So it can be pronounced Ay-dawn (more common) or Ay-awn, as usually in old names the 'dh' isn't pronounced. E.g.
Cliodhna is Clíona - Clee-oh-na
Aiden is the anglicisation of Aodhán.