I suggest you try the free search tool at https://familysearch.org/search and enter what data you do know to start your search, such as approximate date/year and Country of birth; any parents names etc. You then can often work backwords so to speak - from parents and siblings to grandparents etc. such as the example of James son of William and Rebecca.
There are some examples below, however you didn't provide any dates or locations so these may not be related as these James 'C' Hudnell's who were born all over the US. There were many more records for James Hudnell/Hudnail/Hudnall on that site without middle name or initial!
Ohio, County Births, 1841-2003
Citing this Record
"Ohio, County Births, 1841-2003," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X6N9-SJ3
James Clinton Hudnall White Male
Birth 04 Feb 1907 Scipio, Meigs, OH
Father William Hudnall Residence Snowville
Mother Rebecca Reeves
Ohio, County Marriages, 1789-1994
Citing this Record "Ohio, County Marriages, 1789-1994," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XZ5T-SFP
William Hudnall
Age over 21
Marriage 30 Oct 1897 Meigs, OH
Spouse Rebecca Reeves
Age over 18
Applicant on license: Frank Reeves (relationship to Rebecca not stated)
Official Wilson Dutton
Reference ID: MR Vol.9 P524
U S Census, 1920 Athens, OH
Citing this Record "United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MD1C-61T
SELF William Hudnall M 46y OH
WIFE Rebecka Hudnall F 40y OH
SON Clarence Hudnall M 15y OH
SON Clinton Hudnall M 13y OH
DAU Louie Hudnall F 10y OH
SON Harry Hudnall M 6y OH
DAU Edyth Hudnall F 3y10m OH
SON Marting Hudnall M 10m OH
James C Hudnell USCensus, 1940 birth: 1936 WV
residence: 1940 Cabin Creek Magisterial District, Kanawha, WV
parents:Russell Hudnell, Silbia Hudnell
James C Hudnall US Census, 1940 birth: 1900 LA
residence: 1940 Tract 43, Denver, Election District M, Denver, CO
spouse:Ina Hudnall
James C Hudnall US Census, 1930 birth: 1922 TX
census: 1930 Denver, Denver, Colorado
James C Hudnall World War II Army Enlistment Records
25 Sep 1942 Ft Thomas, Newport, KY
birth: 1915 WEST VIRGINIA