Information from some of William Allen's descendants is that Affarila's last name was Toalson.I don't know the source of that.However, she was apparently the Affyrely, age 9, b Missouri, dau of Micha Toalson (age 49, female, b in Ky), who were listed in the 1850 Boone Co, Mo census. In the 1860 Boone Co census they were Alffairly, age 16 ("male), b Mo, and Micha, age 56 (female), b Ky.In the 1870 Boone Co census, it was Micha Tolson, age 69 ("male"), b Ky, and Affaryla, age 20 (female), b Mo.There were quite a number of male Toalson/Tolsons in the 1840 Boone and Howard Co, Mo census, so hard to guess which one was the right family, simply from that.
However on www.rootsweb.com, I see that an entry by Virgina, email: firstname.lastname@example.org, with information on the family of William A. Tolson, b ca 1781 Va, d 19 Jul 1841 Boone Co, Mo, who married 16 Aug 1824 Madison Co, Ky to Micha Brown (his 2nd marriage).Micha d 11 Aug 1874.William was the son of Thomas Tolson (from Stafford Co, Va) and Sarah Marchment.This site lists a number of children, including their youngest Affaryla, b ca 1841-44 Mo, but no further info on her.
My webpage for William James Allen and Anliza (Ann) Nester's family is: www.michaeldnestor.com/nester/nesterb11 I'll update my webpage with this new info.
Some of my sources are listed at the bottom of that page.