Thanks for this additional information :-) Another important fact that I have is that I have 'George Sim' on the boat to Australia (on the Scottish Wizard) with Dinah and James in 1882 aged 4 (which would like up with him being born 'about 1877'). The first official document I have where you uses the full name George Mercer Sim is on his Marriage Certificate (1909). So there is definitely a Mercer connection. I will have a look at the names you have suggested to see if it might be a match. Thanks!