JD
James Davidson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Illinois
Our Model Tree links this James Davidson across the 1920, 1930 and 1940 US Censuses in Marion-County, Illinois (XGBoost, ~Confirmed), with identified parents Hardee & Libbie — first a son (b.~1914), then head of a 5-person household.
Age 26
b. ~1914
Male
Son
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Illinois |
| Surname | Davidson |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Salem Township |
| Additional Details | |
| Occupation | machinist |
| Industry | auto supply |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 864 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Machinist |
| Township / Ward | Salem Township |
| Est. Birth Year | ~1914 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Lois Davidson | Daughter | — | 32 | ~1908 |
| H Davidson | Head | — | 73 | ~1867 |
| Clarice Davidson | Other | — | 21 | ~1919 |
| James Davidson | Son | — | 26 | ~1914 |
| Libbie Davidson | Spouse | — | 65 | ~1875 |
Census Appearances
1920
Marion, Illinois
Son, age 6
Marion, Illinois · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Marion, Illinois
Son, age 16
Marion, Illinois · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | James H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Marion-County, Illinois
Son, age 26
Marion-County, Illinois · implied b. ~1914 — 5 household members
| Surname | Davidson |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Salem Township |
| Occupation | machinist |
| Industry | auto supply |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 864 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 James Davidson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Hardee Davidson (~0.92 confidence) and mother Libbie Davidson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Hardee Davidson
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Libbie Davidson
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Davidson
Son · 1940 · age 26 · b. ~1914 · Illinois
★ You are viewing this record
Sibling
Lois Davidson
Sibling · 1940 · age 32
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 — Marion-County, Illinois
Open full size
1940 US Federal Census — Marion-County, Illinois
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-00853-00512)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jessie Ruth Rozell | 7 | daughter | — | Arkansas |
| 42 | T. L. Rozell | 5 | son | — | Arkansas |
| 43 | Ida Mae Rozell | 64 | mother | — | Arkansas |
| 44 | Amari Loomis | 44 | Head | Farmer | Illinois |
| 45 | Ruby Loomis | 43 | wife | — | Illinois |
| 46 | Gladys Marie Loomis | 18 | daughter | — | Illinois |
| 47 | Raymond Loomis | 15 | son | — | Illinois |
| 48 | Margaret Ann Loomis | 10 | daughter | — | Illinois |
| 49 | Carl Flanagan | 41 | Head | Laborer | Illinois |
| 50 | Anna Flanagan | 38 | wife | — | Illinois |
| 51 | Virginia Jean Flanagan | 4 | daughter | — | Illinois |
| 52 | Clarence Stonecipher | 44 | Head | Carpenter | Illinois |
| 53 | Helen Stonecipher | 40 | wife | — | Illinois |
| 54 | Thos. Edwin Stonecipher | 18 | son | — | Illinois |
| 55 | Robert L. Stonecipher | 16 | son | — | Illinois |
| 56 | Warren L. Stonecipher | 13 | son | — | Illinois |
| 57 | Ervin G. Stonecipher | 21 | Head | Machinist | Illinois |
| 58 | Emma D. Stonecipher | 19 | wife | Cutter | Illinois |
| 59 | Emmet Garner | 57 | Head | Farmer | Illinois |
| 60 | Carrie Garner | 52 | wife | — | Illinois |
| 61 | H. O. Davidson | 73 | Head | Farmer | Illinois |
| 62 | Libbie Davidson | 65 | wife | — | Illinois |
| 63 | Lois Davidson | 32 | daughter | Teacher | Illinois |
| 64 | James Davidson THIS PERSON | 26 | son | Machinist | Illinois |
| 65 | Clarice Davidson | 21 | daughter-in-law | Housemaid | Illinois |
| 66 | Francis Leckrone | 26 | Head | Dairyman | Illinois |
| 67 | Bessie Leckrone | 24 | wife | Stenographer | Illinois |
| 68 | Nancy J. Leckrone | 1 | daughter | — | Illinois |
| 69 | Walter Gatewood | 45 | Head | Foreman | Oklahoma |
| 70 | Ona Gatewood | 40 | wife | — | Oklahoma |
| 71 | Earl Gatewood | 18 | son | — | Oklahoma |
| 72 | Roy Gatewood | 15 | son | — | Oklahoma |
| 73 | James Morgan | 51 | Head | Landscaper | Indiana |
| 74 | Paul D. Younger | 74 | Head | Gardner | Illinois |
| 75 | Emma Younger | 70 | wife | — | Illinois |
| 76 | Raymond Dabbs | 36 | Head | Pumper | Tennessee |
| 77 | Zella Dabbs | 46 | wife | — | Alabama |
Pedigree Summary
James + 1 sibling
Gen 1 · 2 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)