Marie, time-line for Addison P CALVERT, so far, is this:
b ca 1841-42 in KY in between census record. Son of whom?
1850 - cannot find him on KY census w/family. Should be about 9-10. Did his parents die and he was living with someone else, because
1860-Addison in Boyle Co KY living with family of George Sandifer, 23, and his wife and children. Addison is 18, b KY, and below his name is that of William Calvert, age 11, b MO.
1870-Addison in Boyle Co KY m and living with second wife, Mary B, 23 and their children: Emma J. 5, Robert C 2, Ada B 4/12 and Addison is 28 b KY
1880-Addison is 39, living in Cass Co MO w/Mary B, 33, Emma 14, Robert 11, Addie 10, Eugene 6, William 4 and Charles 10/12.
It is my theory that Robert, age 11, was named for Mary B. Gray Calvert's father, Robert H, and that Addie was perhaps a broken version of Addison, and that William was named for Addison's brother, who was 11 in 1860.I don't have a theory for the other children.