71 years 9 months 22 days.
Son of John and Elizabeth Boothe Gregg.

Spouse of Susannah Doughton, m: Aug 9 1826.
Eleven known children:
- John Flint (1827-1888 b: Parker-Gregg m: Mary Jane Page, ch: Infant son, Sarah J., William M., Susan, Elizabeth E. George W. They also raised nephew Columbus "Lum" Page);
- Rachel (1829-1860 m: Stewart Lightle aka Lytle, ch: Nathan Perry, Andrew J., Susan John W. Mary J. In 1860 census as Lyttle, head, living next to siblings and parents.
- Mary M. (Polly) (m: John Emery Page ch: Infant dau, Francis M., Susan J., Mary Ellen, Elizabeth Anna, John Lincoln "Link", Ida Luvina, Nancy B, Amanda S, William Franklin);
- Rosanna (1834-1911 m: Joseph Martin ch: Joseph Franklin)
- Elizabeth B. "Betsy" (1837-abt 1910 m1 Lewis Bradford, ch Lorinda, m2: Andrew J. Maupin);
- Elenora/Ellen "Nellie" (1838- m1: Martin Poor, m2: Vincent D. Lain);
- Nathan Jr. (1840-1919 m1: Mrs. Eliza Jane Beach/Beech ch: Thomas, William D, Mary Ann, Sarah E, Lucy J. John W., Luvina Francis, James P.; m2: Mrs. Louisa May Page Cornett, ch: Sena, Andrew Jackson, Louisa May; stepchildren: Henry Edgar, Perry Lee, Miriam Bathsheba, Edward Turner and Nancy Isabell Cornett.);
- William (Bill) Montgomery (1842-1918 m: Sarah Elizabeth "Lizzie" Wells, ch: Lena "Linnie", Sarah Elizabeth, Nora Ellen.);
- Jacob/Joseph (1843-1927 m: Susan Margaret Cathy ch: Unk, Joseph "Joe" N, Aaron Alfred, Perry Christy, Mary Ethel Josephine);
- Aaron Didd (1847-1905 m: Alice G. Lane, ch: Nancy Ellen "Nellie", Alva Nelson "Pappy", Bessie Susan); Didd and Alice also raised James Henry Coleman from about age 12 when his mother died, not known if they also raised any of his siblings);
- Martha Jane (1849-1925 m: George Madison Tabor, Eleven ch inc: Albert, William, Aaron E., Mary Luana, James, Effie E., Joseph Franklin, Bertha E., 3 unk)

1830 Jefferson, Ross OH: Nathan and Susannah have a son and dau under 5 yrs (John Flint and Rachel).

1840 Harrison, Ross OH: Nathan and Susannah have 2 sons and 5 daughters (assumed to be John F. and Nathan, Rachel, Mary, Rosanna, Elenora and Elizabeth)

1850 Dist. 16, CASS Co MO: GRAGG Nathan/42, Susannah/42, Rachel/21, Rosannah/17, Elizabeth/13, Nelly/12, Nathan/10, William/7, Jacob/6, Aaron/4, Martha J/1. {first 7 born OH last 4 in MO.}
{nextdoor/close are the Gragg/Gregg families: James & Martha, John & Elizabeth, Isaac & Hathanine, Malcolm & Rebecca. Also the Andrew & Mary Maupin, Robert & Mary Cornett, Oliver & Blanche Little/Lytel and Hannah Lane families that Nathan's children married in to.

1860 census, Sugar Creek, Wadesburg Cass Co: GREGG Nathan/56, Susan/58, Rosanna/24, William/15, Jacob/13, Aaron/11, Martha J/9. Next door is son John/32 and family, next is a TABOR family, next is dau LYTTLE, Rachel/30, Nathan/8, Andrew J/7, Susan/5, John Wesley/3, Mary J/1 - Rachel appears to be widowed; next is dau BRADFORD Elizabeth/23, Lewis/40, Lorinda/7M, next is dau POOR Elendor/22, Martin/22 and Martin's brother Silas R/24.

1870 Cass CO: GREGG Nathan/66, Susana/67, John/24, Jacob/23, Aaron/21 LYTTLE John Wesley/13, Mary J./11 LABOR George M./23, Martha/20.
(note: the Lyttle children are grandchildren, ch. of Rachel, and are also shown in household of their aunt Ellen Gregg Lain; LABOR should be TABOR, Martha is their dau)

1876: Mo. census, Sherman Twp, Cass Co MO.

Marriage: Nathan Gregg to Susanna Roughton by Alexr. Gordon, Justice of the Peace, license dated Augt. 9, 1826 from the Clerk of the Court of Common Pleas of Ross County, recorded 16th day of October 1826

As seen on-line:
U.S. and Intl. Marriage Records, 1560-1900
Name: Nathan Gregg
Gender: Male
Birth Place: OH, Birth Year:1801
Spouse Name: Susannah
Spouse Birth Place: OH
Spouse Birth Year: 1800
Number Pages: 1
{Note, no surname provided for Susannah}