Hello Tam,
My mum's grandmother, Catherine Hamilton was your grandmother’s younger sister. She married William Campbell from Castlebank Street, Partick, at St Peter’s Church, Partick, in 1905. They later lived at South Elgin Street. Their only son, also named William married Mary McEwan. Her family were well known around the Bisley area. My mum, Catherine Campbell was born in East Clyde Street. By 1933 she and her family moved to Gordon Street, Clydebank.
Regards
Leslie