Hi Lorna, I am doing some research for a good friend whose great grandmother is Una Coffey Hamilton. My friends mother is Karin Hamilton, and her grandmother is Robbie Una Hamilton who is the sister to your mother Georgia Shirley Hamilton. I have limited info but am slowly but surely piecing things together. I would appreciate any info you could share with me on their lines. Thanks so much. You can message me here or click on my name for direct email.