Yes I would say you have the correct family going by the census records
1871 census address Cherry cottage Yetholm Roxburgh
William Turnbull age 28 born Cavers ..Ag; Lab
Joanna Turnbull age 31 born England
Jane Turnbull age 4 b Westruther Berwick
Janet age 2 born Yetholm date of birth for Janet 10/5/1868 father William Turnbull mother Joanna Gourlay
1881 census address Haymount Roxburgh
William 38.Joanna Gourlay Turnbull 41 , born Northumberland
Jane 14,Janet 12, John 11,Annie 9,James 7, Isabella 2,Walter George 10 days old
1891 census Stewards house Crailing Roxburgh
William 18,Joanna 51 ,John 21, Annie 19, James G 17, Isabella 12, Walter G 10
Marriage 16 March 1866 Yetholm Roxburgh William Turnbull ...Joanna Gourlay Redpath
Rosie