Using cleaver search techniques, I found my own answers regarding Grant McColgin.
Born 5-FEB-1870, his parents were Thomas D. McColgin and Mary S. Marshall married in 1857.
Siblings were: 1)Oscar 1858 to 1941 2)Willie 1860 to ? 3)Luella 1863 to ? 4)Anna 1865 to ? 5)Lizzie 1867 to ? 6)Totten T. McColgin and 7)E.B. McColgin.
Grant's parents were: Thomas D. McColgin 1827 to 11JAN1918 who married Mary S. Marshall in 1857.Mary was born in 1838 and died in 1917.
Thomas D. McColgin's parents were: Thomas McColgin who came from Ireland.Thomas married Mariah Totten in 1823.
Finally, Thomas (from Ireland) with Mariah, gave birth to several other children besides Thomas D.; they were: 1)John T. McColgin 1824 - ? 2)Almira ? 3)Caroline Adelia 1829 - 20FEB1916 who married James McCormick 4)Ann Maria 1833 - 11NOV1916 buried at Aspinwall, PA and 5)Lydia Angeline McColgin ?
So now to research Thomas McColgin from Ireland who arrived in the U.S. at approx. 1800...
Hope all these names help connect lots of branches out on the McColgin tree...