Mary's parents were Philip and Elizabeth Messenskie from Hesse-Darmstadt, Germany. They had a very large family in Wisconsin.
"Wisconsin, County Marriages, 1836-1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XR24-TPB : 3 June 2016), Willoughby C. Mendenhall and Mary Missenskie, 28 Dec 1873; citing Menasha, Winnebago, Wisconsin, United States, Wisconsin Historical Society, Madison; FHL microfilm 1,275,611.
Year: 1860; Census Place: Menasha, Winnebago, Wisconsin; Roll: M653_1437; Page: 372; Family History Library Film: 805437.
Year: 1870; Census Place: Menasha, Winnebago, Wisconsin; Roll: M593_1745; Page: 43B; Image: 278198; Family History Library Film: 553244.
Year: 1880; Census Place: Amherst Junction, Portage, Wisconsin; Roll: 1442; Family History Film: 1255442; Page: 36B; Enumeration District: 134.