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James Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this James Davis across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Davis |
| Given Name | James J., Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Jean Davis | Daughter | — | 18 | ~1922 |
| Jewell Davis | Daughter | — | 14 | ~1926 |
| Jane Davis | Daughter | — | 19 | ~1921 |
| Joan Davis | Daughter | — | 16 | ~1924 |
| James Davis | Head | — | 66 | ~1874 |
| James Davis | Son | — | 23 | ~1917 |
| Jean Davis | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 2
Allegheny, Pennsylvania · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | James J. II |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 13
Allegheny, Pennsylvania · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | James J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 23
Allegheny-County, Pennsylvania · implied b. ~1917 — 7 household members
| Surname | Davis |
| Given Name | James J., Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Davis (~0.92 confidence) and father James Davis (~0.92 confidence) and father James Davis (~0.92 confidence) and mother Jean Davis (~0.92 confidence) and mother Jean Davis (~0.92 confidence) and mother Jean Davis (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Davis
b. ~1874
Source father
● Household
· direct · ~0.92
Father
James Davis
b. ~1874
Source father
● Household
· direct · ~0.92
Father
James Davis
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Jean Davis
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Jean Davis
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Jean Davis
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Davis
Son · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Sibling
Joan Davis
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Davis
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Davis
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jewell Davis
Sibling · 1940 · age 14
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
12 people indexed on this census page (nara:1940:m-t0627-03676-00443)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | James J., Sr. Davis | 66 | Head | Executive Director | England |
| 3 | Jean R. Davis | 50 | Wife | — | Pennsylvania |
| 4 | James J., Jr. Davis THIS PERSON | 23 | Son | — | Pennsylvania |
| 5 | Jane E. Davis | 19 | Daughter | — | Pennsylvania |
| 6 | Jean A. Davis | 18 | Daughter | — | Pennsylvania |
| 7 | Joan E. Davis | 16 | Daughter | — | Pennsylvania |
| 8 | Jewell Ann Davis | 14 | Daughter | — | Pennsylvania |
| 9 | John E. Mcstern | 54 | Head | Auditor | Pennsylvania |
| 10 | Elizabeth Mcstern | 43 | Wife | — | Pennsylvania |
| 11 | John Mcstern | 12 | Son | — | Pennsylvania |
| 12 | Betty Mcstern | 9 | Daughter | — | Pennsylvania |
| 13 | Robert Mcstern | 5 | Son | — | Pennsylvania |
Pedigree Summary
James + 4 siblings
Gen 1 · 6 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)