James B. Davis, one of fourteen children born in Bastrop County, Texas to parents: Jonathan Patrick Davis, Jr. and Mary Ann Eggleston Davis.
Martin Van Buren 17 Sep 1844;
Permelia 29 Jan 1847;
James Barry 18 Dec 1849;
Jonathan 3 Aug 1851;
Jemina Hixie 11 Aug 1852;
Sarah Frances 5 Feb 1854;
Mariah Elizabeth 24 Dec 1856;
George Washington 1 Aug 1858;
Mary Ann 5 Feb 1860;
Carrie Hazel 30 Jan 1862;
Emma Allison 9 Jul 1864;
Effie Arminta 9 Nov 1866;
Ida Irene 11 Dec 1868
Per Obituary of his mother Mary Ann Eggleston Davis listed in the Bastrop Advertisor, Bastrop, Texas Vol. 48, No. 10, Ed 1, Saturday, March 10, 1900, son James B. Davis and one infant predeceased the mother.

1850 United States Federal Census
Name: James B Davis
Age: 1
Birth Year: abt 1849
Birthplace: Texas
Home in 1850: Bastrop, Texas, USA
Gender: Male
Family Number: 168
Household Members:
Name Age
Jonathon Davis 32
Mary A Davis 23
Martin V Davis 5
Parmelia Davis 3
James B Davis 1

1860 United States Federal Census
Name: James Davis
Age: 12
Birth Year: abt 1848
Gender: Male
Birth Place: Texas
Home in 1860: Precinct 6, Bastrop, Texas
Post Office: Bastrop
Family Number: 363
Value of real estate: View image
Household Members:
Name Age
Jonathan Davis 45
Mary Ann Davis 34
Martin Davis 16
Permilla Davis 14
James Davis 12
John Davis 10
Mira Davis 3
Sarah Davis 6
Mariah Davis 5
George Davis 3
Mary Ann Davis 2
Francis Davis 75 (mother of Jonathan)

James B. Davis married Mary E. Reid on 27 August 1872, Bastrop County, Texas.

1880 United States Federal Census
Name: James Davis
Age: 31
Birth Year: abt 1849
Birthplace: Texas
Home in 1880: Alum Creek, Bastrop, Texas
Race: White
Gender: Male
Relation to Head of House: Self (Head)
Marital Status: Married
Spouse's Name: Mary Davis
Father's Birthplace: Tennessee
Mother's Birthplace: South Carolina
Occupation: Farmer
Household Members:
Name Age
James Davis 31
Mary Davis 27
James Davis 5
George W. Davis 3
Mariah Davis 8m

It is thought, but not confirmed, that James B. Davis died during the 1880 decades. Two addition children were born after the 1880 census: a son Walter born about 1883 and a girl, listed as Lula born about 1886. James Davis' wife, Mary E. Reid Davis married J. J. Swain 05 Nov 1890, Travis, Texas. These children of James B. Davis are listed on the 1900 census Justice Precinct 1-2, Travis, Texas, living in the household of Stepfather John J Swain, and their mother Mary E. Reid Davis Swain show as stepchildren to head of house John J. Swain.