Hi Nan
If the relations you are enquiring about are William Allan (b. 1841, New Monkland, Lanarkshire) and Catherine Clark (b. 1844 in Ballachulish Argyleshire), there is a tree on Ancestry that includes this family. According to the documentation in that tree, William Allan died on 10 July 1914 in Glasgow and Catherine Clark died on 28 November 1916 in Glasgow.
The 1901 census shows Catherine (head, carting contractor), her seven children and grandson, John Marshall, living at 33 Minard Road, Cathcart.
Their daughter, Agnes Allan, emigrated to Canada, arriving in Quebec on the Hesperian on 22 September 1912. She married George Lang Currie on 24 September 1912 in York, Ontario and they had a daughter Catherine Allan Currie (b. 1914 in Galt, Ontario, Canada).
Cheers,
Rodeo