Looking for Alexander Davidson Dow Forebears

I am looking for James Davidson Dow 1866 – 1950 m 1889 Alice Harriett Gilbert 1868 – 1956, their forebears and descendants.

David Dow b abt 1770 m Janet Taylor – my ggggg grandparents
Son Adam Dow b 1804 m Catherine Mitchell b. 1806 - my gggg grandparents
Son Alexander Davidson Dow abt. 1833 - 1899 m Hellen Barr abt 1826 – 1875 my ggg grandparents
Son James Davidson Dow 1866 – 1950 m Alice Harriett Gilbert 1868 – 1956 – my gg grandparents
Son Albert Victor Dow 1899 – 1971 m. Agnes Margarette O’Shaughnesy 1902 – 1970 – my grandparents

I am looking for Alice Harriett Gilbert 1868 – 1956 m 1889 James Davidson Dow 1866 – 1950, their forebears and descendants.
Thomas Gilbert b abt. 1801 m Jane Powell 1813 – 1874 - my gggg grandparents
Son Thomas Gilbert 1838 – 1891 m 1859 Letitia Mary Sharp 1839 – 1912 - my ggg grandparents
Daughter - Alice Harriett Gilbert 1868 – 1956 m 1889 James Davidson Dow 1866 – 1950 - my gg grandparents
Son Albert Victor Dow 1899 – 1971 m. Agnes Magarette O’Shaughnesy 1902 – 1970 – my grandparents