Hi Amanda,
Thanks for looking at both LDS and scotlands people. I don't have much else to go on, his first two daughters were Isabella and Grace, so his mothers name may be one of those as well. My mother in-law has been trying to locate him for some years. He was tried at the Old Bailey I think it was called, we have a lot of info on him from the time he came to Aus, but not much beforehand. She thinks he may of come from Banff for some reason, not exactly sure why that is. We haven't located his trial records. He came out on the Layton in 1829...
Thanks again for looking.