Heather
I have spoken to my mum, she has no family named Jimmy McGilvray but she vaguely remembers her Uncle Tommy having a son who they sometimes called Jimmy, though that wasn't his real name, she herself was born in Sanke, Niveston Ave, then moved to Ashgill, her aunts where called Katherine, Little Kate and Big Catherine my mum being Little Catherine, she also has family with the surname of Weir, who intermarried into the McGilvrays.
My mum was born in 1947 and lived in and out of Larkhall/Ashgill/Sanke until she was 16 so about 1963, then moved to England, but still has lots of family there.
She says there is a chance that somewhere along the line, everyone is related as everyone was always marrying in and out of the McGilvrays.
Nancy