JD
James Davidson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this James Davidson across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Davidson |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | PW |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Miner |
| Township / Ward | Springfield |
| Est. Birth Year | ~1910 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Davidson | Head | — | 30 | ~1910 |
| Daniel Davidson | Son | — | 6 | ~1934 |
| Neta Davidson | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Sangamon, Illinois
Son, age 10
Sangamon, Illinois · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Son, age 20
Sangamon, Illinois · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Miner |
| Industry | Mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Head, age 30
Sangamon-County, Illinois · implied b. ~1910 — 3 household members
| Surname | Davidson |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Sangamon |
| Occupation | Miner |
| Industry | Coal mine |
| Class of Worker | PW |
| Highest Grade | No 8 |
| 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 John Davidson (~0.92 confidence) and father John Davidson (~0.92 confidence) and mother Lizzie Davidson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Davidson
b. ~1886
Source father
● Household
· direct · ~0.92
Father
John Davidson
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Lizzie Davidson
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Davidson
Head · 1940 · age 30 · b. ~1910 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00885-00759)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Irene Farrand | 16 | Step Daughter | — | Illinois |
| 2 | John Gammantoni | 26 | Head | Truck Driver | Kansas |
| 3 | Mary Gammantoni | 25 | Wife | Machine Oper. | Illinois |
| 4 | Joseph Laurenzana | 56 | Head | Laborer | Italy |
| 5 | Vera Laurenzana | 49 | Wife | — | Italy |
| 6 | Louise Laurenzana | 19 | Daughter | — | Illinois |
| 7 | Rose Mary Laurenzana | 13 | Daughter | — | Illinois |
| 8 | Joseph Laurenzana | 9 | Son | — | Illinois |
| 9 | Felix Saponara | 54 | Lodger | Laborer | Italy |
| 10 | Albert M. Yoakum | 61 | Head | — | Illinois |
| 11 | Tillie Yoakum | 62 | Wife | — | Pennsylvania |
| 12 | Charles Yoakum | 70 | Brother | — | Illinois |
| 13 | Harold Davidson | 24 | Head | Laborer | Illinois |
| 14 | Mae Davidson | 23 | Wife | — | Tennessee |
| 15 | Donald Davidson | 11 | Brother | — | Illinois |
| 16 | Elizabeth Davidson | 53 | Mother | — | Illinois |
| 17 | James Davidson THIS PERSON | 30 | Head | Miner | Illinois |
| 18 | Neta Davidson | 29 | Wife | Seamstress | Kansas |
| 19 | Daniel Davidson | 6 | Son | — | Illinois |
| 20 | Frances Jurkens | 52 | Head | — | Illinois |
| 21 | August Jurkens | 25 | Son | Stock Clerk | Illinois |
| 22 | Enoch Blazis | 32 | Son in law | Bartender | Pennsylvania |
| 23 | Josephine Blazis | 30 | Daughter | Typist | Illinois |
| 24 | Grace Gebhardt | 43 | Head | — | Illinois |
| 25 | Clarence Little | 60 | Lodger | Laborer | Illinois |
| 26 | Myrtle Gathers | 49 | Wife | — | Illinois |
| 27 | John Gathers | 47 | Head | Miner | Illinois |
| 28 | Minnie Hull | 64 | Mother in law | — | Illinois |
| 29 | Frank Fisher | 24 | Lodger | Truck Driver | Illinois |
| 30 | Mary Fisher | 21 | Lodger | — | Illinois |
| 31 | Anna Steetel | 18 | Lodger | Waitress | Illinois |
| 32 | John Mayberry | 62 | Lodger | — | Illinois |
| 33 | Raymond Mayberry | 25 | Son | Laborer | Illinois |
| 34 | Earl Mayberry | 24 | Son | Baker | Illinois |
| 35 | Nan Wilhite | 77 | Lodger | — | Illinois |
| 36 | Ella Carroll | 75 | Head | Seamstress | Illinois |
| 37 | Baxter Mcclanahan | 43 | Head | Shoe Cutter | Missouri |
| 38 | Maud Mcclanahan | 46 | Wife | — | Missouri |
| 39 | Walter Mcclanahan | 13 | Son | — | Missouri |
Pedigree Summary
James
Gen 1 · 3 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)