JM
John Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this John Mcdonald across the 1920, 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a head (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | McDonald |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Newark |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | furnace man |
| Industry | refining smelting co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | H-1 |
| 1935 Residence | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Furnace Man |
| Township / Ward | Maplewood |
| Est. Birth Year | ~1911 |
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 |
|---|---|---|---|---|
| Lois Mcdonald | Daughter | — | 3 | ~1937 |
| John Mcdonald | Head | — | 29 | ~1911 |
| John Mcdonald | Son | — | 8 | ~1932 |
| Helen Mcdonald | Spouse | — | 27 | ~1913 |
Census Appearances
1920
Essex, New …
Son, age 8
Essex, New Jersey · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Essex, New …
Son, age 18
Essex, New Jersey · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Donald |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Salesman |
| Industry | Lumber Company |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Head, age 29
Essex-County, New Jersey · implied b. ~1911 — 4 household members
| Surname | McDonald |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Newark |
| 1935 Residence (County) | Essex |
| Occupation | furnace man |
| Industry | refining smelting co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | H-1 |
| 1935 Residence | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Mcdonald (~0.92 confidence) and father Thomas Mc Donald (~0.92 confidence) and mother Mary Mcdonald (~0.92 confidence) and mother Mary Mc Donald (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Mcdonald
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Thomas Mc Donald
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mary Mcdonald
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mary Mc Donald
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcdonald
Head · 1940 · age 29 · b. ~1911 · 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 — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02336-00397)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary E Sayre | 79 | Head | — | New Jersey |
| 2 | Mabel R Sayre | 46 | Daughter | Supervising Clerk | New Jersey |
| 3 | Wright Florence Sayre | 50 | Daughter | — | New Jersey |
| 4 | Shirley Sayre | 10 | Granddaughter | — | New Jersey |
| 5 | John E Durham | 61 | Head | Forman Electric Generator | New Jersey |
| 6 | Susie Durham | 49 | Wife | — | New Jersey |
| 7 | Ernest Durham | 28 | Son | Operating Sta | New Jersey |
| 8 | Frances Drucker | 23 | Lodger | Operating Stenog | New Jersey |
| 9 | Ernest Schilling | 30 | Head | Engineer | New Jersey |
| 10 | Elsie Schilling | 27 | Wife | — | New York |
| 11 | Barbara Schilling | 2 | Daughter | — | New Jersey |
| 12 | Louis Vittmuller | 56 | Head | Sup Tool Mfg | Connecticut |
| 13 | Martha W Vittmuller | 52 | Wife | — | New York |
| 14 | Roy H Mills | 42 | Head | Minister | New York |
| 15 | Mary B Mills | 44 | Wife | — | Iowa |
| 16 | George S Mills | 5 | Son | — | New Jersey |
| 17 | Sara Mills | 2 | Daughter | — | New Jersey |
| 18 | Rose Hemmer | 46 | Head | — | New Jersey |
| 19 | William Hemmer | 23 | Son | Machinist | New Jersey |
| 20 | Helen Hemmer | 19 | Wife | — | Rhode Island |
| 21 | Regina Tyson | 5 | Lodger | — | New Jersey |
| 22 | Ronald Tyson | 4 | Lodger | — | New Jersey |
| 23 | John Mcdonald THIS PERSON | 29 | Head | Furnace Man | New Jersey |
| 24 | Helen Mcdonald | 27 | Wife | — | New Jersey |
| 25 | John Mcdonald | 8 | Son | — | New Jersey |
| 26 | Lois Mcdonald | 3 | Daughter | — | New Jersey |
| 27 | Chas Traver | 34 | Head | Installation | New York |
| 28 | Violet Traver | 26 | Wife | — | New Jersey |
| 29 | Charles Traver | 7 | Son | — | New Jersey |
| 30 | Robert Lindsey | 26 | Head | Cook | New Jersey |
| 31 | Helen Lindsey | 23 | Wife | — | New Jersey |
| 32 | Robert Jr Lindsey | 2 | Son | — | New Jersey |
| 33 | Joseph Ross | 61 | Head | Bartender | Italy |
| 34 | Rose R Ross | 50 | Wife | — | New York |
| 35 | Adam Litowchak | 39 | Head | Truck Driver | New Jersey |
| 36 | Claire Litowchak | 24 | Wife | — | New Jersey |
| 37 | Richard Litowchak | 4 | Son | — | New Jersey |
| 38 | Nicholas Litowchak | 53 | Head | Care Taker Coal Yard | Austria |
| 39 | Anna Litowchak | 50 | Wife | — | Austria |
| 40 | Herman Bohnenberger | 47 | Head | Instructor Tool Maker | New Jersey |
Pedigree Summary
John
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)