JD
John Davidson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this John Davidson across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents James & Mary — first a head (b.~1903), then head of a 4-person household.
Age 37
b. ~1903
Male
Head
Born: SCOTLAND
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | DAVIDSON |
| Given Name | JOHN |
| Relationship to Head | HEAD |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | SCOTLAND |
| 1935 Residence (City) | PRINCETON |
| 1935 Residence (County) | MERCER |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | UTILITY MAN |
| Industry | PRIVATE HOME |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 750 |
| Highest Grade | No 7 |
| 1935 Residence | NEW JERSEY |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Utility Man |
| Township / Ward | Lawrence Township |
| Est. Birth Year | ~1903 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Beatrice Davidson | Daughter | — | 17 | ~1923 |
| John Davidson | Head | — | 37 | ~1903 |
| John Davidson | Son | — | 16 | ~1924 |
| Mildred Davidson | Spouse | — | 37 | ~1903 |
Census Appearances
1920
Mercer, New …
Son, age 17
Mercer, New Jersey · implied b. ~1903 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1912 |
| Naturalization Status | Alien |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Farmer |
| Industry | Gen. farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Mercer, New …
Head, age 27
Mercer, New Jersey · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Scotland |
| Age at First Marriage | 19 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Yes |
| Industry | Plaster-Bricklayer |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | $7,000 |
| Radio Set | R |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Mercer-County, New …
Head, age 37
Mercer-County, New Jersey · implied b. ~1903 — 4 household members
| Surname | DAVIDSON |
| Given Name | JOHN |
| Relationship to Head | HEAD |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | SCOTLAND |
| 1935 Residence (City) | PRINCETON |
| 1935 Residence (County) | MERCER |
| Naturalization Status | Naturalized |
| Occupation | UTILITY MAN |
| Industry | PRIVATE HOME |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 750 |
| Highest Grade | No 7 |
| 1935 Residence | NEW JERSEY |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 John Davidson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Davidson (~0.92 confidence) and mother Mary Davidson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Davidson
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Mary Davidson
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Davidson
Head · 1940 · age 37 · b. ~1903 · New Jersey
★ 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 — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02357-00279)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jay Sellerde | 34 | BUTLER | Butler | N. CAROLINA |
| 42 | Elle Sellerde | 33 | MAID | Maid | S. CAROLINA |
| 43 | Charles Wooden | 55 | HEAD | Inspector | MARYLAND |
| 44 | Lucy Wooden | 54 | WIFE | — | NEW JERSEY |
| 45 | Elizabeth Wooden | 24 | DAUGHTER | Comptometer Operator | MARYLAND |
| 46 | Peggy Wooden | 18 | DAUGHTER | Asst. Librarian | MARYLAND |
| 47 | June Wooden | 15 | DAUGHTER | — | MARYLAND |
| 48 | Henry Pease | 75 | UNCLE | Retired | NEW JERSEY |
| 49 | George Pratt | 28 | HEAD | — | NEW JERSEY |
| 50 | Perla Clark | 28 | MAID | Maid | NEW JERSEY |
| 51 | Catherine Clark | 9 | DAUGHTER | — | NEW JERSEY |
| 52 | Pearl Clark | 8 | DAUGHTER | — | NEW JERSEY |
| 53 | Delores Clark | 5 | DAUGHTER | — | NEW JERSEY |
| 54 | William C. Pullen | 13 | NEPHEW | — | NEW JERSEY |
| 55 | Jedson Williams | 62 | HEAD | Laborer | GEORGIA |
| 56 | Lillie Williams | 54 | WIFE | — | GEORGIA |
| 57 | Catherine Williams | 20 | DAUGHTER | — | GEORGIA |
| 58 | John Williams | 19 | SON | Laborer | GEORGIA |
| 59 | Florence Williams | 15 | DAUGHTER | — | GEORGIA |
| 60 | Isaac Williams | 4 | SON | — | NEW JERSEY |
| 61 | James Williams | 5 | SON | — | NEW JERSEY |
| 62 | Claudine Lucas | 25 | DAUGHTER | House Work | GEORGIA |
| 63 | Geraldine Lucas | 5 | GRAND DAUGHTER | — | NEW JERSEY |
| 64 | Bruce Lucas | 4 | GRAND SON | — | NEW JERSEY |
| 65 | Fredric Schluter | 39 | HEAD | President | NEW JERSEY |
| 66 | Charlotte Schluter | 39 | WIFE | — | ILLINOIS |
| 67 | Fredric Jr. Schluter | 14 | SON | — | NEW JERSEY |
| 68 | William Schluter | 12 | SON | — | NEW YORK |
| 69 | John Schluter | 11 | SON | — | NEW YORK |
| 70 | Peter Schluter | 6 | SON | — | CONNECTICUT |
| 71 | John Davidson THIS PERSON | 37 | HEAD | Utility Man | SCOTLAND |
| 72 | Mildred Davidson | 37 | WIFE | Maid | CONNECTICUT |
| 73 | Beatrice Davidson | 17 | DAUGHTER | — | NEW JERSEY |
| 74 | John Davidson | 16 | SON | — | NEW JERSEY |
| 75 | Richard T. Anderson | 61 | HEAD | Gen. Manager | NEW JERSEY |
| 76 | Madeline Anderson | 56 | WIFE | — | NEW JERSEY |
| 77 | David J. Anderson | 21 | SON | — | NEW JERSEY |
| 78 | Margaret C. Anderson | 17 | DAUGHTER | — | NEW JERSEY |
| 79 | Rhona Powell | 52 | MAID | Maid | N. CAROLINA |
| 80 | John Bush | 67 | HEAD | Laborer | NEW JERSEY |
Pedigree Summary
John
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)