Robert Wills was born to Robert Wills and Eliza Donlon on 10 May 1856 in Glenedagh, County Mayo, Ireland. He immigrated to the United States in 1878 and married Sophia Louis Flint on 21 December 1887. By 1897, he was living in Tooele, Utah. Wills was manager of the State Nursery Company for twenty years. He moved his family from Tooele to Salt Lake City, Utah, in or around 1905. He died in Salt Lake City on 5 September 1917.
 “Local Mentions,” Tooele (UT) Transcript, 7 Sept. 1917, ; “Robert Wills,” FamilySearch (Person ID: K2H1-WKD), accessed 23 Oct. 2020, https://www.familysearch.org/tree/person/timeline/K2H1-WKD; Robert Wills and Sophia Lois Flint, marriage record, 21 Dec. 1887, “United States Western States Marriage Index,” database with images, FamilySearch, https://www.familysearch.org/ark:/61903/1:1:XZNG-32W?from=lynx1UIV8; Robert Wills, death certificate, 9 Sept. 1917, “Utah Death Certificates, 1904–1965,” database with images, FamilySearch, https://www.familysearch.org/ark:/61903/3:1:S3HY-DYFS-GBM?i=1034&cc=1747615&personaUrl=%2Fark%3A%2F61903%2F1%3A1%3AXZ2N-WQT.