I'm another one from Australia who knew the song as Doctor Ironheart. The lyrics are pretty much as stated by my fellow Australian, but the nonsense word section I remember quite differently. The version I remember goes... My name is Doctor Ironheart, fuddle diddle ay pom pom! Otherwise, the rest of the words sound as I learnt them. I used to have a song book from primary school, but when I changed schools and showed it to one of my new teachers, it somehow disappeared, at which I felt a great loss. It had a lot of other great songs in it like 'Li'l Liza Jane' etc.