Yes, this is the family. I am a descendent of Malcomb Washington McNeil, who was my great grandfather.I have also met via the internet a descendent of the Creel line.
Here's what I have.
Henry Alvey, born September 3, 1933, died June 18, 1914 in Topeka, Kansas.He Married Sarah A. Dunham, November 15,1855, daughter of Eli Dunhan, and Roxanna Harris. She was born Feb 03, 1834 in Killingsley, CT, and died Oct 25, 1933.
Children I knew of:
Roxanna Alvey, b. May 14,1862, Paxton, IL, d. Feb 17,1933, Grand Junction, CO.
Marcia Jane Alvey, b. July 22, 1870.
Based on a family picture, we also suspect there might be a brother named, Harris Alvey.Could this be the Harriet in the your information?
Children of Roxanna Alvey and Malcomb McNeil:
Henry Dunham McNeil, b. 1887, Aiken, MN d. 1954, Aiken. He married Mary Costello, 1914.
Lindley McNeil, b. aft 1889
Josephine Malvina McNeil, b. Jan 26, 1889, Winnebago, MN, d. October 23,1972, San Mateo, CA. (my grandmother)
Lamont McNeil, b. aft 1890
Grant McNeil, b. After 1891 and died as a child.
Welcome McNeil, b. after 1891, died at 21
Marcia Jane Alvey married Martin Luther Creel. They had a child Velma Myrtle Creel, born November 11, 1908.She married Elbert Leo Welch.
I have more information on children, but since many are still alive, I would prefer to not post that information.