Thanks for your input John. Most of what you say I was aware of except the South Leith reference. Can you tell me where you know this from?
I am not sure the parents listed in the Australian Dictionary of Biography are correct as I have suspicions from other evidence.
Since my original post I have come across another Allan line from the same streets of Edinburgh which are relations but I also do not know the connection. I have come across an audio recording from a relative (dated about 1990) who was almost 100 years old, who mentioned visiting a sea captain who was a relative in Adelaide who was drowned and whose body was found later under some seaweed on an Adelaide beach. After some investigation i realised it was his wife Margaret Walsh nee Allan from Edinburgh.
I have purchased a few records from Soctlands People to help, but so far not much luck. Allan is a fairly common name, so I spend a lot of time trying to narrow down the possibilities before jumping in and using my credits on a wrong choice.
The 3 lines Euphemia Allen (Allan?), Margaret Allan, and Christian Allan can all be placed within a few streets of each other in Edinburgh. Occupations of shoemaker were common in all the 3 lines as well, and all with life events in Canongate registers.
Again, thanks for the imput.