1.  Index to the Delaware County [Indiana] Marriage Records, 1827-1920 (online at the Delaware County INGenWeb site [link died]).

Groom/Bride	Spouse	Date of Birth	Marriage Date	Book	Pg
Johnsonbaugh George	Elizabeth Eshelman		Apr  6 1851	C-2	489
Eshelman Elizabeth	George Johnsonbaugh		Apr  6 1851	C-2	489
Johnsonbaugh George	Louisa Cline		Aug 23 1857	C-3	344
Cline Louisa	G Johnsonbaugh		Aug 23 1857	C-3	344

2.  Census Records, Indiana, 1860 (Broderbund CD-304):  Albany P.O., Delaware Twp., Delaware Co., IN, p. 686, 346/346:

22A	Johnsonbaugh, George	M	30	W	Carpenter	$500	$100	Pennsylvania
23A	Johnsonbaugh, Louisa	F	20	W				Indiana
24A	Johnsonbaugh, Sarah E.	F	1	W				Indiana

Where is Elizabeth?  Is she the Elizabeth living with David & Margaret JOHNSONBAUGH?  If so, it suggests that David is his uncle. 

3.  Family Quest Archives:  Indiana 1870 Census Index.  Heritage Quest ACD-0038:

Surname	Given name	Age	Sex	Race	Birth Place	County	Locality	Roll	Page
JOHNSONBAUGH	GEO	41	M	W	OH	DELAWARE	HAMILTON TWP	310	529

4.  Anon.  1894.  A Portrait and Biographical Record of Delaware and Randolph Counties, Ind.  A.W. Bowen & Co., Chicago (biographies online at countyhistory.com):

GEORGE JONSONBOUGH (deceased).--Among the departed citizens of Delaware County, held in grateful remembrance by a large circle of relatives and friends, the name of George Jonsonbough is deserving of special mention. The ancestors of Mr. Jonsonbough were natives of Pennsylvania, in which state his father, John Jonsonbough, and mother, whose maiden name was Hannah Wise, were both born.  They were married in Wayne county, Ohio, January 29, 1828, and later moved to Indiana, locating in White county, where Mr. Jonsonbough followed his trade of coopering until his death in September, 1878.  His wife died a number of years previous, having been called to her final rest on the 21st of November 1846.  John and Hannah Jonsonbough reared a family of eight children, whose names are as follows:  George, whose name introduces this sketch; Daniel; Elizabeth, deceased; Catherine, deceased; Henry; Minta, deceased; Margaret, wife of James Richie; and Hannah, wife of Perry Godlove.  George Jonsonbough was born in Wayne county, Ohio, January 25, 1829.  When sixteen years of age, he began to learn the trade of carpenter and builder, in which he soon acquired great proficiency and at which he worked for some time in his native state and in Indiana.  In 1867, he removed to Royerton, purchased the first lot that was sold in that town, and erected a dwelling thereon, and for some time operated quite successfully a sawmill, which was extensively patronized by the citizens of Royerton and vicinity.  He was a man of sterling integrity and was highly respected in the community where he resided.  His death occurred on the 24th day of April 1888, and Union Cemetery of Delaware County is his final resting place.  Mr. Jonsonbough was married on the 22d day of August 1857, to Louisa Cline, daughter of Abraham and Massey Cline, natives of Ireland and Virginia, respectively.  Mrs. Jonsonbough was one of a family of nine children, as follows: Jane, Elizabeth, Jemima, Amanda, Mahlon L., Eli B., Mary E., Sarah J. and Louisa.  The mother of the above children died September 14, 1855, and Mr. Cline afterward married Hannah Hatfield, to which union three children were born: Martha A., Emmery and Flora.  The father and mother of these children died August 30, 1866, and October 30, 1892, respectively.  To the marriage of Mr. and Mrs. Jonsonbough were born seven children: Sarah A., April 7, 1859, wife of Eli Studebaker; Elmer E., January 9, 1862; Ira A., January 7, 1865; Henry K., June 20, 1870; Leotis, March 31, 1875; James and Maggie, deceased.  It will thus be seen that the Jonsonbough family were among the pioneers of Delaware County and that the family has always maintained a high standard of respectability.

Why is the earlier marriage to Elizabeth ESHELMAN not mentioned?  Are these two different George JOHNSONBAUGHs?

5.  LDS.  Family Search: Internet Genealogy Service:  AF - Ancestral File (online at FamilySearch.org).