JD
James Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Fayette-County, Pennsylvania
Our Model Tree links this James Davis across the 1910, 1920, 1930 and 1940 US Censuses in Fayette-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents James & May — first a son (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Fayette-County, Pennsylvania |
| Surname | Davis |
| Given Name | James W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Hopwood |
| 1935 Residence (County) | Fayette |
| Additional Details | |
| Occupation | Dentist |
| Industry | Own Practice |
| Class of Worker | OA |
| Hours Worked | 34 |
| Income (1939) | 52 |
| Highest Grade | C 5 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Dentist |
| Township / Ward | Hopwood |
| 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 Davis | Head | — | 71 | ~1869 |
| James Davis | Son | — | 30 | ~1910 |
| May Davis | Spouse | — | 56 | ~1884 |
Census Appearances
1910
Fayette, Pennsylvania
Son, age
Fayette, Pennsylvania · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | James W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | Ohio |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Fayette, Pennsylvania
Son, age 9
Fayette, Pennsylvania · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | James W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Fayette, Pennsylvania
Son, age 20
Fayette, Pennsylvania · implied b. ~1910
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Davis |
| Given Name | James W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | Ohio |
| Occupation | Truck driver |
| Industry | Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Fayette-County, Pennsylvania
Son, age 30
Fayette-County, Pennsylvania · implied b. ~1910 — 3 household members
| Surname | Davis |
| Given Name | James W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Hopwood |
| 1935 Residence (County) | Fayette |
| Occupation | Dentist |
| Industry | Own Practice |
| Class of Worker | OA |
| Hours Worked | 34 |
| Income (1939) | 52 |
| Highest Grade | C 5 |
| 1935 Residence | Same House |
| 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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Davis (~0.92 confidence) and mother May Davis (~0.92 confidence) and mother Mary Davis (~0.92 confidence) and mother May Davis (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Davis
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
May Davis
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Mary Davis
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
May Davis
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Davis
Son · 1940 · age 30 · b. ~1910 · Pennsylvania
★ 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 — Fayette-County, Pennsylvania
Open full size
1940 US Federal Census — Fayette-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03506-00334)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James W. Davis | 71 | Head | — | West Virginia |
| 2 | May S. Davis | 56 | Wife | — | Ohio |
| 3 | James W. Jr. Davis THIS PERSON | 30 | Son | Dentist | Pennsylvania |
| 4 | James E. Costolo | 23 | Head | Laborer | Pennsylvania |
| 5 | Erma Costolo | 20 | Wife | — | Pennsylvania |
| 6 | Carl E. Costolo | 3 | Son | — | Pennsylvania |
| 7 | Juanita M. Costolo | 2 | Daughter | — | Pennsylvania |
| 8 | Sandra J. Costolo | 0 | Daughter | — | Pennsylvania |
| 9 | Margaret E. Reddy | 53 | Head | — | England |
| 10 | William Reddy | 29 | Son | Stonecutter | Pennsylvania |
| 11 | Charles H. Reddy | 24 | Son | Laborer | Pennsylvania |
| 12 | Francis A. Reddy | 21 | Son | Maintenance Worker | Pennsylvania |
| 13 | Mary M. Reddy | 21 | Daughter-in-law | — | Pennsylvania |
| 14 | Mary M. Reddy | 0 | Granddaughter | — | Pennsylvania |
| 15 | Luigi De Concilis | 54 | Head | Grocer | Italy |
| 16 | Maria De Concilis | 42 | Wife | — | Italy |
| 17 | Rose M. De Concilis | 22 | Daughter | Seamstress | Pennsylvania |
| 18 | Frank J. De Concilis | 21 | Son | Truck Driver | Pennsylvania |
| 19 | Antony V. De Concilis | 16 | Son | — | Pennsylvania |
| 20 | John J. Moore | 45 | Head | Shot Firer | Pennsylvania |
| 21 | Catherine A. Moore | 22 | Daughter | New Worker | Pennsylvania |
| 22 | Elizabeth J. Moore | 22 | Daughter | New Worker | Pennsylvania |
| 23 | Edward L. Moore | 18 | Son | — | Pennsylvania |
| 24 | Francis E. Moore | 17 | Son | — | Pennsylvania |
| 25 | Rita A. Moore | 14 | Daughter | — | Pennsylvania |
| 26 | John J. Jr. Moore | 12 | Son | — | Pennsylvania |
| 27 | George B. Moore | 11 | Son | — | Pennsylvania |
| 28 | Arleigh E. Rearick | 25 | Head | Mechanics Helper | Pennsylvania |
| 29 | Jean A. Rearick | 23 | Wife | — | Pennsylvania |
| 30 | Arline R. Rearick | 3 | Daughter | — | California |
| 31 | Thomas E. Sr. Conn | 51 | Head | Sawyer | Pennsylvania |
| 32 | Pauline B. Conn | 48 | Wife | — | Pennsylvania |
| 33 | Thomas E. Jr. Conn | 22 | Son | Junior Messenger | Pennsylvania |
| 34 | Lois E. Conn | 18 | Daughter | Typist | Pennsylvania |
| 35 | Doris A. Conn | 17 | Daughter | — | Pennsylvania |
| 36 | Barbara A. Conn | 15 | Daughter | — | Pennsylvania |
| 37 | Henrietta J. Conn | 12 | Daughter | — | Pennsylvania |
| 38 | Mary J. Conn | 10 | Daughter | — | Pennsylvania |
| 39 | Donald M. Conn | 8 | Son | — | Pennsylvania |
| 40 | Robert Veach | 3 | County Ward | — | Pennsylvania |
Pedigree Summary
James
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)