Sutherland of Maryland

I am looking for relatives that are kin to the William Sutherland, born about 1715, married Elizabeth Travis about 1743, Charles Co MD.Immigrate ancestor is Robert Sutherland from Scotland who came to America around 1682 to Virginia. Family tradition is that Robert came to America along with two other brothers.One brother went to Maryland, one remained in VA (Culpeper Co) and one brother went to South Carolina.
William and Elizabeth (Travis) Sutherland had the follwing children:
1.Traverse (Travis) Sutherland born abt 1745
2.Walter Sutherland born abt 1749 Revolutionary War Soldier
3.Frederick Sutherland, born about 1752
4.David Sutherland, born about 1754
5.John Sutherland, born about 1757
6.Mary Sutherland, born about 1758 married _____Coats
7.Ann Sutherland, born about 1760married ____ Elgin
Sutherlands moved to KY around 1808 to Henry Co KY.
Any information is much appreciated.Thank YOU.