I agree. Rebecca (the mother) appears as
Robertson in both the 1861 and 1871 census.
There is an Alexander O. S. Robertson born abt 1825 in the 1861 census in Sophiasburgh and in 1881 in
Belleville who I think might also be a child of Alexander and Rebecca. He is married to Elizabeth
Fox, who is related to Agnes
Robertson through her marriage to Harmonius. Or is this the
Owen you mentioned? It could be Alexander
Owen Stillman/Stowell
Robertson.
Could you send me a copy of the obits and thier source?