The 1880 US census for Carroll County, Missouri at https://www.familysearch.org/ark:/61903/3:1:33S7-9YBH-1J2?i=6&cc=1417683
lists the following people in the household. (So, the short answer is yes, it appears they are brothers):
Wilkerson Hunt Male age 58 Married White Farmer Self born about 1822 in Virginia
Rachall Hunt Female age 57 Married White Keeping House Wife born about 1823 in Ohio, United States
Sarah Hunt Female age 25 Single White Daughter b. about 1855 in Indiana, United States
William Hunt Male age 30 Single White Son b. about 1850 in Indiana, United States
Henry Hunt Male age 14 Single White Son b. about 1866 in Indiana, United States
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:33S7-9YBH-1J2?cc=1417683&wc=QZ27-1Z6%3A1589408163%2C1589395842%2C1589401513%2C1589395189
: 24 December 2015), Missouri > Carroll > Wood > ED 142 > image 7 of 24; citing NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.).
There is a little more to see if you follow the link and look at the actual census image.