There's no death of Marion Wilson or Scott in Scotland in 1857. Marion Wilson or Scott, mother's maiden surname Lockhart, died in Old Kilpatrick in 1889 aged 68.
Robert Scott, mother's maiden surname Watson, died in Old Kilpatrick in 1888 aged 71.
James Scott, aged 90, died in Old Kilpatrick in 1950. Mothers' maiden names are still being added for the 1940s and 1950s.
Robert Watson Scott died in Old Kilpatrick in 1944 aged 79.
Margaret Scott, mother's maiden surname Wilson, died in Old Kilpatrick in 1926 aged 66.
You must check all the death certificates to make sure they are the right people.
If you need any more, it's easy to look them up for yourself at
www.scotlandspeople.gov.uk - anything after 1855 is in the statutory records of births, marriages and deaths. Earlier events, if the record exists, will be in the church records.