Married wife Nancy J(?) Morrow on 1866-11-14 in Lee Co, Iowa. No record of children.
Hospital Steward in US Army during Civil War. Private, E Co, 19th Regiment, Iowa Infantry.
Easy confusion -- besides this George (b1841, IA) and his father George (b1816, MA), older brother Asoph also named one of his sons George H Dewey (b1876, MO).
Conflicting death dates -- FG memorial for George Jr cites 1875 without headstone photo, but George Jr's Armed Forces grave registration says 1841-02-07 thru 1891-08-08. Did he die on the same day as his father, or does someone have bad info?
1860, age 19 - IA, Lee, Washington, page 120, family 909. "United States Census, 1860", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M8L9-PVG : 30 December 2015), Kate M Dewey in entry for George H Dewey, 1860.
Military service - "United States Civil War Soldiers Index, 1861-1865," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FSPV-1MG : 4 December 2014), George H. Dewey, 19th Regiment, Iowa Infantry, Company , E, Union; citing NARA microfilm publication M541 (Washington D.C.: National Archives and Records Administration, n.d.), roll 7; FHL microfilm .
1866 marriage - "Iowa, County Marriages, 1838-1934," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XJW9-JXS : 18 October 2017), George H. Dewey, Jr. and Nancy J. Morrow, 14 Nov 1866, Lee, Iowa, United States; citing reference pg 33, county courthouses, Iowa; FHL microfilm 959,191.