Oh that's interesting!
I'm sure I've actually heard the name blue/bluey in passing at some point. I really want to trace the lineage on his (Nelson) side but I know so little that I'm not making much progress.
Sorry for my stupidity here, but Nelson would be your grandfather on your fathers side, right? I know my mum had some brothers (the only one I can remember is Tony/Anthony), so would that be the connection if we are indeed related? I only really know my aunts on that side, even then it was mostly when I was quite young.