Other names for Cecilia were Chelly and Kathy.1
1881 Scotland Census about Sarah McKay
She resided in 1881 in 27 Lumsden Street, Anderston, Glasgow. 3
She resided at 36 Thornwood Drive, Partick before 22 Jun 1910. 2
Cecilia married William McKay, son of Unknown and Unknown. (William McKay was born Cal 1822 in Ireland 1 and died before 1881.)
1 Scotland's People - Document Image, www.scotlandspeople.gov.uk, 1861C.
2 Scotland's People - Document Image, www.scotlandspeople.gov.uk, Death.
3 Ancestry.com Online Census and BMD, www.ancestry.com, 1881C.