This is the tombstone of George Friedrich Herzog, located in row 5 of Zion Lutheran Cemetery, Chattanooga, Mercer County, Ohio. The marker is inscribed:
Geb. den 26. Feb, 1825
Gest. Den 21 Juli, 1901
Alter 76 J. 4 M, 25 T.
[some writing in German]
I KNOW THAT MY REDEEMER LIVETH
Translation: Georg Friedrich Herzog, born 26 February 1825, Died 21 July 1901.
According to Zion Chatt’s records, Georg “Friedrich” Herzog was born 26 February 1825 in Buschendorf, County Court Herzogenauerach, District Unterfranken, in the Kingdom of Bavaria, Europe. [Some of Zion Chatt’s records were very detailed, even providing the name of the continent!]
He usually went by the name of Friedrich and I will use that name here. This surname is sometimes spelled Hartzog or Hardzog in various records.
Friedrich was the son of Johann Herzog and his wife Margaretha, but her maiden name was not given in the church records. Friedrich was baptized and confirmed in Buschendorf and immigrated to America in 1846. He first lived in Butler County, Ohio, before moving to Mercer County.
Friedrich married Catharine Kuhn on 15 April 1852 in Mercer County, Ohio.  Catharine was the daughter of Heinrich/Henry and Margaretha Kuhn.
Friedrich and Catharine lived in the Chatt area after their marriage, where they had a Shanesville/Shanes Crossing post office address. Frederich was a farmer and it appears that they did not have had any children. Just the two of them were enumerated in the 1860 and 1870 censuses. Zion Chatt’s communion records begin in 1861 and Fred and Catharine are listed among those first recorded communicants in December 1861.
In 1860: Friedrich, 35, and Catharine, 34. Both were reportedly born in Germany. 
In 1870: Friedrich, 46, and Catharine, 43. Both were reportedly born in Bavaria. 
Friedrich’s wife Catharine died 9 December 1871 at the age of 44 years, 9 months, and a few days. She has two tombstones in Zion Chatt’s cemetery, an older one and a newer one. Both tombstones are side by side and the newer one is situated next to her husband’s stone.
Friedrich married soon after Catharine’s death. He married Maria/Mary Betzel on 27 January 1872, married by Lutheran pastor L. “Lerr.” 
In 1880 Friedrich, 55, and Mary, 52, lived in Liberty Township, where Friedrich was a retired farmer. There were no children in the household. This record indicates they were both born in Bavaria. 
According to the 1888 and 1900 plat maps a Friedrich Herzog lived on the east side of downtown Chattanooga. There were at least two Friedrich Herzogs in the area and I am not sure which one of them lived in Chatt. I have not located today’s subject in the 1900 census.
It appears that Friedrich and Mary did not have any children.
Georg Friedrich Herzog died of a stroke on 21 July 1901, at the age of 76 years, 4 months, and 25 days. He was buried on the 23rd.
His widow Marie died a couple years later and is buried on the other side of Friedrich.
Friedrich had an older brother George who is also mentioned in Zion Chatt’s records. In the church records George Herzog had the same parents as Friedrich, was from the same town in Bavaria, and was a couple years older than Friedrich. George Herzog was born 2 July 1823 in Buschendorf and the record indicates that George immigrated with his parents in 1845 and resided in Butler County, Ohio, before eventually moving to Mercer County. George married Sarah Anna Thaney/Tannery in 1850  and they had at least five children: Johann Jacob, Elisabeth Jane, Margaretha, Michael, and Carolina.
 “Ohio, County Marriages, 1789-2013,” database with images, FamilySearch.org (accessed 29 Jan 2017), Frederick Hartzog/Harzog and Catharine Kuhn, 15 Apr 1852; Mercer County Marriages, Vol.ABC, p375. ; FHL microfilm 914955.
 1860 U.S. Census, Black Creek, Mercer, Ohio, p.333, dwelling 625, family 630, Fred Hardsag; Ancestry.com ( accessed 29 Jan 2017); FHL microfilm 805009, NARA microfilm M653, roll 1009.
 1870 U.S. Census, Black Creek, Mercer, Ohio, p.29B, dwelling/family 158, Fredrick Hardzog; Ancestry.com (accessed 29 Jan 2017); FHL microfilm 552742, NARA microfilm M593, roll 1243.
 “Ohio, County Marriages, 1789-2013,” database with images, FamilySearch.org (accessed 5 Feb 2017), Frederick Herzog and Mary Betzel, 27 Jan 1872; Mercer County Marriages, Vol. 3, p.301; FHL microfilm 914956.
 1880 U.S. Census, Liberty, Mercer, Ohio, ED 188, p.471B, dwelling 15, family 16, Frederick Hartsog; Ancestry.com (accessed 5 Feb 2017); NARA microfilm T9, roll 1048.
 “Ohio Marriages, 1800-1958,” database, FamilySearch.org (accessed 5 Feb 2017), George Hartzig and Sarah Tannery, 24 Jan 1850; Butler County Marriages, Vol. 1-4; FHL microfilm 0355779. [Zion Chatt’s records shows her name as Thaney; the FamilySearch database shows her name as Tannery.]