Married to Nancy "Nannie" Gay on December 11, 1998 in Pitt County, North Carolina.

William and Nannie were the parents of Minnie Virginia Allen Parker.

Married to Margaret Frances "Maggie" Hinson.

William and Maggie were the parents of John Robert Allen, William Elwood "Willie" Allen, Annie Allen Hobgood(1905-1998), Andrew Hinson "Drew" Allen, Eunice Maybelle Allen Beam and Rosa M Allen Mooring.
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1880 United States Federal Census
Name: William R. Allen
Home in 1880: Farmville, Pitt, North Carolina
Age: 4
Estimated Birth Year: abt 1876
Birthplace: North Carolina
Relation to Head of Household: Son
Father's Name: James Allen
Father's birthplace: North Carolina
Mother's Name: Ashly Ann Allen
Mother's birthplace: North Carolina
Occupation: At Home
Marital Status: Single
Race: White
Gender: Male
Household Members: Name Age
James Allen 27
Ashly Ann Allen 25
John R Allen 5
William R Allen 4
Minnie A Allen 2
Bessie L Allen 3m

1900 United States Federal Census
Name: Robert Allen
Age: 24
Birth Date: Mar 1876
Birthplace: North Carolina
Home in 1900: Farmville, Pitt, North Carolina
Race: White
Gender: Male
Relation to Head of House: Son
Marital Status: Married
Marriage Year: 1898
Years Married: 2
Father's Name: James W Allen
Father's Birthplace: North Carolina
Mother's Name: Annie A Allen
Mother's Birthplace: North Carolina
Household Members: Name Age
James W Allen 46
Annie A Allen 44
John R Allen 25
Robert Allen 24
Bessie Allen 20
Gideon Allen 18
James T Allen 16
Maggie G Allen 14
Nannie Allen 22
Minnie V Allen 8/12
Elias Allen 44

1910 United States Federal Census
Name: William R Allen
Age in 1910: 34
Birth Year: 1876
Birthplace: North Carolina
Home in 1910: Farmville, Pitt, North Carolina
Race: White
Gender: Male
Relation to Head of House: Head
Marital Status: Married
Spouse's Name: Maggie Allen
Father's Birthplace: North Carolina
Mother's Birthplace: North Carolina
Household Members: Name Age
William R Allen 34
Maggie Allen 27
Robert Allen 7
Willie E Allen 5
Annie Allen 4
Dunns Allen 2
Mabell Allen 12 mo

1920 United States Federal Census
Name: W R Allen
Age: 43
Birth Year: abt 1877
Birthplace: North Carolina
Home in 1920: Farmville, Pitt, North Carolina
Race: White
Gender: Male
Relation to Head of House: Self (Head)
Marital Status: Married
Spouse's Name: Maggie Allen
Father's Birthplace: North Carolina
Mother's Birthplace: North Carolina
Home Owned: Rent
Able to Read: Yes
Able to Write: Yes
Household Members: Name Age
W R Allen 43
Maggie Allen 38
J R Allen 17
Elwood Allen 15
Annie Allen 14
Drew Allen 12
Maybelle Allen 10
Rosa M Allen 0

1930 United States Federal Census
Name: Robert W Allen
Birth Year: abt 1876
Birthplace: North Carolina
Home in 1930: Farmville, Pitt, North Carolina
Relation to Head of House: Head
Spouse's Name: Maggie Allen
Household Members: Name Age
Robert W Allen 54
Maggie Allen 18
Elwood Allen 25
Andrew Allen 22
Rosa Allen 10
Garnett Baker 11
Spicie Baker 55

North Carolina Death Certificates, 1909-1975
Name: William Robert Allen
Gender: Male
Race: White
Age: 86
Marital status: Married
Occupation: Retired farmer
Birth Date: 24 Mar 1876
Birth Place: Pitt, North Carolina, United States
Death Date: 13 Apr 1962
Death Location: Farmville, Pitt
Spouse's name: May Hinson Allen
Father's Name: James W Allen
Mother's Name: Ashby Ann Meeks
Residence: Farmville, Pitt, North Carolina
Cause of death: Coronary occlusion, pneumonia
Informant: Drew Allen, Rt 2, Farmville
Burial: Allen Family Cemetery, Rt 2, Farmville, NC
Undertaker: Farmville Funeral Home, Farmville, NC