This would be an excellent One Name Study. The scope of a one-name study can be as broad or specific as you like, depending on your purpose. It looks like maybe you are hoping to connect all the Inneses in North East Scotland before 1800 only. If it were me, I would create a one-name study for Innes by setting up the freespace, then create a sub-project of the Inneses in North East Scotland before 1800. That way, in the future, either you or someone else could come along and continue the general Innes One Name Study and you could continue on your merry way concentrating on those you are most interested in.