I don't have any verified information on these Thurbers, but based on various census records and WWI draft records, Cyrus Albert Thurber was b. 27 March 1883. His parents were Charles and Rosa/Rosie Thurber. I didn't find any record of a sister Rosa/Rosie and am very suspicious of the 1910 census entry for Charles, Cyrus and Rosie.This is likely Charles, a widower, and formerly maried to Rosa/Rosie - and the father of Cyrus who is now married to Sophie/Sophia.
Census entries are often not reliable for genealogical purposes. There is no way to know who provided the information. Sometimes it was not even a family member.
With this Thurber family the 1900 census had a son Myron age 5. But in 1910, the 15-year-old son's name is Hiram, not Myron. There is a WWI draft card for Hiram Lewis Thurber b. 1895.Note that a married Hiram Thurber about the right age is enumerated just 2 households away from Charles, Rosie, and Cyrus in 1920 census.
One final oddity in that 1920 census record of Charles, Rosie and Cyrus, is that "daughter Rosie" is listed as having both parents b. Canada.
Enties for Charles are not consistent from census to census.In 1900 he lists his father b. Canada and mother b. Michigan.His mother is living with him and here her birth location does have Michigan.
But in 1910, Charles lists both parents b. Canada.And then in 1920 Charles lists both parents b. WI.That alone should make show the problems with census records!