I have occasionally encountered Census entries where "Widow/Widower" was a euphemism for "Married but Separated" in that era when Divorce was more difficult.
Scotland's People initial Surname Search produces quite a few results for HASSANELLA-
Census 1901.Learn more. 1 match Census 1911.Learn more. 8 matches Census 1881 (LDS).Learn more. No exact matches Statutory Register Births 1855 - 2012.Learn more. 12 matches Statutory Register Marriages 1855 - 2012.Learn more. 4 matches Statutory Register Deaths 1855 - 2012.Learn more. 18 matches Valuation Rolls 1915.Learn more. 1 match
Checking in the Statutory Births, 1855 to 1911, there are 8 Exact Matches and 13 Variants including the Exact; ie 8 Exact + 5 Variant = 13 Total.
Male Marriages 2 Exact 9 Variant as above
Female Marriages 2 Exact 4 Variant as above
Deaths 3 Exact 10 Variant as above
This may help, from the LDS Family Search site-
Name: Janet Gilmour Hamilton Gender: Female Christening Date: Christening Place: Birth Date: 01 Jan 1891 Birthplace: Calton, Glasgow, Lanark, Scotland Death Date: Name Note: Race: Father's Name: Andrew Hamilton Father's Birthplace: Father's Age: Mother's Name: Ann Hasanella Hamilton Mother's Birthplace: Mother's Age: Indexing Project (Batch) Number: C01956-6 System Origin: Scotland-EASy GS Film number: 255138 Reference ID: p16
Other entries on familysearch suggest-
There are other slighter possibilities.
John Hassanally Scotland, Births and Baptisms, 1564-1950
spouse: Catherine Downie child: John Hassanally John Hassanally Scotland, Births and Baptisms, 1564-1950