Hi,
The Familysearch website gives the following children of Henry Sutherland and Osla Ballentine, all born in Walls and Flotta parish: Adam 1779, James 1781, Margaret 28 Dec 1783, Isabella 1786, Helen 1788, Jean 1789, Henry 1792, Samuel 1794, Elspet 1797 and John 1799.
Henry Sutherland was born 1754 to William Sutherland and Marion Cromarty. I believe Osla was born Ursilla Ballenden in 1757 to James Ballenden and Margaret Sabiston in Orphir parish.
Regards, J