In the 1860 census of Jacksonville, Jackson, Oregon Zilpha J. McCubby age 9 born Missouri is enumerated with her parents A. McCubby age 42 born Kentucky and Sarah McCubby age 31 born Missouri. The eldest child present is Jno. B. McCubby born circa 1847 in Missouri.
[Note: I found this by doing a fuzzy search on the first name and surname -- any first name beginning with Z and any surname beginning with M. I chose the 1860 census because it was the first in which Zilpha would appear and she would very likely be with her parents.]
In the 1850 census of Abraham McCubbin age 33 born Kentucky and Sarah McCubbin age 21 born Missouri are resident in Miller County, Missouri, with a number of children including their eldest John age 3 born Missouri.
[Note: This was the first census in which Jno. B born circa 1847 would appear -- again, he would very likely be with his parents.]
I would be cautiously confident that Zilpha's parents are Abraham McCubbin and Sarah; however, I have not confirmed without a doubt that there are no other candidates in the relevant censuses.
An Idaho death certificate from March 1922 for Leander Pleasant McCubbin names his parents as Abraham McCubbin and Sarah Dean; it is noteworthy that in the 1850 census there are 3 young individuals named Jane Dean (19), Jacob Dean (15) and Perry Dean (15) in the household of Alexander McCubbin and his wife Sarah.
- Indexed transcriptions of the 1860 US census are available at
familysearch.org; I am not aware of any free source of the images but
ancestry.com and findmypast.com both have them available under their
- The 1850 US census is searchable with viewable images at familysearch.org.
- FamilySearch.org has indexed Idaho Death Certificates 1911-1937.