I descend from Alexander Abbey b. 1750 and Helen Mitchell b. 1754 (both in Scotland).They had a daughter Helen Abbey b. 1775 and she married George Hay (both born in Scotland).This is my Abbey connection.
You descend from a son, Robert b. 1788 in Scotland.He was an early ship builder in the Port Dalhousie area. Robert married Mary Powell.I know of eight children and David was the youngest.
Let me know if you need more info.I don't have a lot but will be glad to share what I do have.