>>Ebenezer and Lovinia were my gg grandparents on my mother's side. Their daughter Emily married Jairus Dunbar, and their son Henry was my grandfather.<<
This is very exciting. Emily's sister Clara was my great-great grandmother, but I don't know any Dunbar relatives (my father and grandfather were only children).
I have conflicts in my notes about Emily, and would be pleased to clarify based on your knowledge!
From one source I have Emily married to Albert Dunbar, son of Jairus Dunbar and Hannah Leach, with five children, Henry, Alberta, Nellie, Arthur and Roderick.
The other source has Emily married to Albert's brother Elisha Dunbar, with two children, Albert Burke (or, in some sources, Burk Albert) and another Jairus, although that has to be an error because his dates are way out of sync.
And you have her as married to Jairus, with son Henry your grandfather. and I wonder how this all fits? Jairus, Jr., yet another sibling of Elisha and Albert, is my great-great grandfather, the one who married Clara Wardwell.
And Clara had two spouses, both of them Dunbars, just to add to the confusion. (This I have from hand-written notes of Clara's daughter, so I'm reasonably certain about its validity.)
Obviously there could be multiple Emily Wardwells here and multiple Jairus Dunbars . . . (The whole name-recyling thing is confusing!)