RM
Robert Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sumter-County, Alabama
Our Model Tree links this Robert Mcdonald across the 1920, 1930 and 1940 US Censuses in Sumter-County, Alabama (XGBoost, ~Confirmed), with identified parents Arch & Archie — first a son (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Male
Son
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sumter-County, Alabama |
| Surname | McDonald |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Beat 5 |
| 1935 Residence (County) | Sumter |
| Additional Details | |
| Occupation | Spinner |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | No 12 |
| 1935 Residence | Same House |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Occupation | Spinner |
| Township / Ward | Beat 5 |
| Est. Birth Year | ~1919 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Mattie Mcdonald | Daughter | — | 19 | ~1921 |
| Laura Mcdonald | Daughter | — | 16 | ~1924 |
| Janet Mcdonald | Daughter | — | 7 | ~1933 |
| Arch Mcdonald | Head | — | 54 | ~1886 |
| Carl Mcdonald | Son | — | 13 | ~1927 |
| Leon Mcdonald | Son | — | 10 | ~1930 |
| Lawrence Mcdonald | Son | — | 28 | ~1912 |
| Robert Mcdonald | Son | — | 21 | ~1919 |
| Bertha Mcdonald | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Sumter, Alabama
Son, age 1
Sumter, Alabama · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Robert H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Mississippi |
| Speaks English | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1930
Sumter, Alabama
Son, age 11
Sumter, Alabama · implied b. ~1919 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Mississippi |
| Can Read/Write | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Sumter-County, Alabama
Son, age 21
Sumter-County, Alabama · implied b. ~1919 — 9 household members
| Surname | McDonald |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Beat 5 |
| 1935 Residence (County) | Sumter |
| Occupation | Spinner |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | No 12 |
| 1935 Residence | Same House |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Robert Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Arch Mcdonald (~0.92 confidence) and father Archie Mcdonald (~0.92 confidence) and mother Bertha Mcdonald (~0.92 confidence) and mother Bertha Mcdonald (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arch Mcdonald
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Archie Mcdonald
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Bertha Mcdonald
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Bertha Mcdonald
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Mcdonald
Son · 1940 · age 21 · b. ~1919 · Alabama
★ You are viewing this record
Sibling
Mattie Mcdonald
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Janet Mcdonald
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Mcdonald
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leon Mcdonald
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laura Mcdonald
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Mcdonald
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sumter-County, Alabama
Open full size
1940 US Federal Census — Sumter-County, Alabama
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00080-00116)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Candis D Halder | 69 | Head | — | Alabama |
| 42 | Lorena Halder | 37 | Daughter | Saleslady | Alabama |
| 43 | J G Anderson | 30 | Lodger | — | Mississippi |
| 44 | Harold Anderson | 28 | Lodger | Teacher | Mississippi |
| 45 | Thomas Mcdonald | 24 | Head | Truck Driver | Alabama |
| 46 | Leona Mcdonald | 39 | Wife | — | Alabama |
| 47 | Clemmie Wolf | 64 | Lodger | — | Alabama |
| 48 | Leslie Cozell | 41 | Head | Minister | Alabama |
| 49 | Maurine Cozell | 35 | Wife | — | Alabama |
| 50 | Ruby Jean Cozell | 5 | Daughter | — | Alabama |
| 51 | Jack Cozell | 2 | Son | — | Alabama |
| 52 | Billy Jo Cozell | 1 | Daughter | — | Alabama |
| 53 | Floyd Bragg | 25 | Head | Salesman | Alabama |
| 54 | Lois Bragg | 18 | Wife | — | Alabama |
| 55 | Barbara Bragg | 0 | Daughter | — | Alabama |
| 56 | Betty Tate | 79 | Head | — | Alabama |
| 57 | Etta Tate | 44 | Daughter | Typist | Alabama |
| 58 | Eunice Tate | 36 | Daughter | — | Alabama |
| 59 | John N Tate | 9 | Nephew | — | Alabama |
| 60 | Lamar Tate | 7 | Nephew | — | Alabama |
| 61 | David Mcdonald | 72 | Head | — | Alabama |
| 62 | Martha Shauburger | 73 | Sister | — | Alabama |
| 63 | Raymond George | 39 | Head | Carpenter | Alabama |
| 64 | Ruth George | 26 | Wife | — | Alabama |
| 65 | Margaret George | 4 | Daughter | — | Alabama |
| 66 | Arch Mcdonald | 54 | Head | Farming | Alabama |
| 67 | Bertha Mcdonald | 48 | Wife | — | Alabama |
| 68 | Lawrence Mcdonald | 28 | Son | Truck Driver | Alabama |
| 69 | Robert Mcdonald THIS PERSON | 21 | Son | Spinner | Alabama |
| 70 | Mattie Mcdonald | 19 | Daughter | Beauty Operator | Alabama |
| 71 | Laura Dell Mcdonald | 16 | Daughter | — | Alabama |
| 72 | Carl Mcdonald | 13 | Son | — | Alabama |
| 73 | Leon Mcdonald | 10 | Son | — | Alabama |
| 74 | Janet Mcdonald | 7 | Daughter | — | Alabama |
| 75 | Lethye Cameron | 58 | Head | — | Alabama |
| 76 | Preston Cameron | 21 | Son | Mechanic | Alabama |
| 77 | Erna Lois Cameron | 18 | Daughter | Saleslady | Alabama |
| 78 | William Bragg | 28 | Head | Store Keeper | Mississippi |
| 79 | Bertha Bragg | 27 | Wife | — | Mississippi |
| 80 | Bobbie Bragg | 2 | Son | — | Mississippi |
Pedigree Summary
Robert + 6 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)