On or shortly after 7 Apr 1803: One Katy Troxall, daughter of Jacob Troxall, married Jonathan Blevins in Wayne Co., Kentucky. Source: "Kentucky, County Marriages, 1797-1954," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKJ3-M8Y4 : accessed 18 November 2017), Jacob Troxall in entry for Jonathan Blevins and Katy Troxall, 07 Apr 1803; citing Wayne, Kentucky, United States, Madison County Courthouse, Richmond; FHL microfilm 591,550.
There were other Troxall marriages during this time period, but the one above is the only (found so far; please help!) that names the father as Jacob. No mother's name provided.
We know that Jacob died 1 July 1843 in DeKalb, Alabama at which time he had a widow Elizabeth.
In 1850, Elizabeth Troxel, age 56, born North Carolina, is enumerated as head of household in DeKalb County, Alabama with two females: Eliza, 17, b Tennessee, and Jane, 3, born Alabama. Elizabeth is likely the widow from Jacob's pension files, but it's not clear if she is mother of the two females enumerated with her-- it's unlikely that she had a child at the age of 53. It's also possible that this Elizabeth is a daughter of Jacob.
Eliza might be a daughter of Jacob, or a granddaughter.
The Jane Troxel, born about 1847, could not have been daughter of Jacob since he died in 1843.
Source: "United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:S3HY-DCDQ-X2Z?cc=1401638&wc=95R8-MNT%3A1031324201%2C1031767201%2C1031767202 : 9 April 2016), Alabama > De Kalb > De Kalb county > image 152 of 188; citing NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).