check the birth locations mentioned in census records. They may differ so watch for that.Look at the parents birth places and see if they match your other info. Here is one: Lawrence MCMAHEL Self M Male W 42 KY Wagonmaker IN KY Nancy E. MCMAHEL Wife M Female W 36 IN Keeping House TN MD Benoni G. MCMAHEL Son S Male W 19 IN Laborer KY IN William A. MCMAHEL Son S Male W 17 IN Laborer KY IN John W. MCMAHEL Son S Male W 14 IN At Home KY IN Arzella MCMAHEL Dau S Female W 12 IN KY IN Louiza E. MCMAHEL Dau S Female W 5 IN KY IN Charles MCMAHEL Son S Male W 3 IN KY IN Maggie I. MCMAHEL Dau S Female W 6M IN KY IN
Source Information: Census Place Oil, Perry, Indiana Family History Library Film 1254304 NA Film Number T9-0304 Page Number 12D
According to one record on familysearch.com her parents were: John W Kellums Mary Ann Gracey
In 1870 they lived in DuBois, In.
1870 United States Federal Census I Name: John W McMiccle [John W McMahel] Birth Year: abt 1865 Age in 1870: 5 Birthplace: Indiana Home in 1870: Hall, Dubois, Indiana Race: White Gender: Male Value of real estate: View image Post Office: Birdseye Household Members: Name Age Lawrance McMiccle 32 Nancy McMiccle 24 Renona G McMiccle 10 Laranzo McMiccle 8 William McMiccle 6 John W McMiccle 5 Arrilla McMiccle 2
In 1860 they were newly married and Benoni wasn'tborn by the dateof the census:
1860 United States Federal Census enum Sept 25, 1860 Name: Nancy E McMahel Age in 1860: 16 Birth Year: abt 1844 Birthplace: Indiana Home in 1860: Jackson, Orange, Indiana Gender: Female Post Office: Newtonstewart Value of real estate: View image Household Members: Name Age Lawrence McMahel 24 Nancy E McMahel 16
Considering that your McMahels lived in duBois Co it seems likely you have the right Nancy.
1850 United States Federal Census about Nancy E Kellams Name: Nancy E Kellams Age: 7 Estimated birth year: abt 1843 Birth Place: Indiana Gender: Female Home in 1850 (City,County,State): Columbia, Dubois, Indiana Family Number: 288 Household Members: Name Age John Kellams 60 Mary Kellams 47 James Kellams 21 Elizabeth Kellams 10 Jane Kellams 20 Elvira Kellams 17 Eliza Kellams 10 Nancy E Kellams 7