Hi. I'm not related to this family.Thanks for posting the Familyseach links.Makes it easier.I think this might be a marriage for Jennie's parents:
William C. Oliver, "Wisconsin, Marriages, 1836-1930"
groom's name: William C. Oliver groom's birth date: groom's birthplace: New York groom's age: bride's name: Juliet Kidney bride's birth date: bride's birthplace: bride's age: marriage date: 04 Jul 1864 marriage place: Sparta, Monroe, Wisconsin groom's father's name: David Oliver groom's mother's name: Mary Oliver bride's father's name: Reuben Kidney bride's mother's name: Sophira Kidney groom's race: White groom's marital status: groom's previous wife's name: bride's race: bride's marital status: bride's previous husband's name: indexing project (batch) number: M01355-7 system origin: Wisconsin-EASy source film number: 1292393 reference number: item 2-3 cn 1266 https://familysearch.org/pal:/MM9.1.1/XRF3-CXN
That certainly could be the family in the 1880 Census link you posted.This might also be the family in 1870:
1870 United States Federal Census about William C Oliver Name: William C Oliver Age in 1870: 36 Birth Year: abt 1834 Birthplace: Canada Home in 1870: Leon, Monroe, Wisconsin Race: White Gender: Male Post Office: Henryville Household Members: Name Age William C Oliver 36b. 1834 Canada-West; Farm Laborer Julia Oliver 30b. 1840 Can-West Charles Oliver 5b. 1865 Wisc Julia A Oliver 3b. 1867 Wisc Mary J Oliver 1b. 1869 Wisc Albert Oliver 25b. 1845 Canada-East; Farm Laborer
This might be William with his parents in 1851:
1851 Census of Canada East, Canada West, New Brunswick, and Nova Scotia about David Oliver Name: David Oliver Gender: Male Age: 52 Estimated Birth Year: abt 1800 Birthplace: Bas Canada, Canada Province: Canada East (Quebec) District: Missisquoi County District Number: 16 Sub-District: Sutton Sub-District Number: 219 Household Members: Name Age David Oliver 52b. 1800 Canada; Farmer Mary Oliver44 -wife- b. 1808 U.S. Simon Oliver18b. 1834 Canada Wm Oliver16b. 1836 Canada ** Samuel Oliver13b. 1839 Canada
----------------the above is on page 87, bottom of page
Sufrona Oliver10b. 1842 Can Albert Oliver7b. 1845 Can ** Orinze? Oliver6b. 1846 Can
---------------the above is on page 99, top of page
This family might have been separated by the census taker as shown above.
There is a tree on Ancestry.com for this family.According to this tree, William C. Oliver who married Juliette Kidney was born 1836 in Quebec and died 17 Aug 1929 in Spink, South Dakota.His parents were David Oliver & Mary Wood (d. 1882 Leon, Wisc).There is quite a bit of detail in this tree, all sourced.It would be a gold mine for you and I think you should check it out.Good luck in your search.Annie