TM
Thomas Mcmahon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this Thomas Mcmahon across the 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 10-person household.
Age 21
b. ~1919
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | New Providence Borough |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Retail Lumber |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 624 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Truck Driver |
| Township / Ward | New Providence Borough |
| Est. Birth Year | ~1919 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Charles Mcmahon | Son | — | 10 | ~1930 |
| Calvin Mcmahon | Son | — | 1 | ~1939 |
| Milton Mcmahon | Son | — | 12 | ~1928 |
| Thomas Mcmahon | Son | — | 21 | ~1919 |
| Viola Mcmahon | Spouse | — | 41 | ~1899 |
| William Mcmahon | Head | — | 39 | ~1901 |
| Roland Mcmahon | Son | — | 4 | ~1936 |
| Lawrence Mcmahon | Son | — | 6 | ~1934 |
| Maurice Mcmahon | Son | — | 18 | ~1922 |
| William Mcmahon | Son | — | 16 | ~1924 |
Census Appearances
1930
Morris, New …
Son, age 11
Morris, New Jersey · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Son, age 21
Union-County, New Jersey · implied b. ~1919 — 10 household members
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | New Providence Borough |
| 1935 Residence (County) | Union |
| Occupation | Truck Driver |
| Industry | Retail Lumber |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 624 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| 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 Thomas Mcmahon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Mcmahon
Son · 1940 · age 21 · b. ~1919 · New Jersey
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Sibling
Calvin Mcmahon
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mcmahon
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roland Mcmahon
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mcmahon
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Mcmahon
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Milton Mcmahon
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maurice Mcmahon
Sibling · 1940 · age 18
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 — Union-County, New Jersey
Open full size
1940 US Federal Census — Union-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02386-00823)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Samuel S. Stapleton | 50 | Head | Street | Virginia |
| 42 | Louise Stapleton | 45 | Wife | — | New Jersey |
| 43 | William Simmons | 19 | Son | New Worker | Michigan |
| 44 | Samuel Jr. Stapleton | 14 | Son | — | New York |
| 45 | Deloris Stapleton | 6 | Daughter | — | New York |
| 46 | William Mcmahon | 39 | Head | Truck Driver | New Jersey |
| 47 | Viola Mcmahon | 41 | Wife | — | New Jersey |
| 48 | Thomas Mcmahon THIS PERSON | 21 | Son | Truck Driver | New Jersey |
| 49 | Maurice Mcmahon | 18 | Son | New Worker | New Jersey |
| 50 | William Jr. Mcmahon | 16 | Son | — | New Jersey |
| 51 | Milton Mcmahon | 12 | Son | — | New Jersey |
| 52 | Charles Mcmahon | 10 | Son | — | New Jersey |
| 53 | Lawrence Mcmahon | 6 | Son | — | New Jersey |
| 54 | Roland Mcmahon | 4 | Son | — | New Jersey |
| 55 | Calvin Mcmahon | 1 | Son | — | New Jersey |
| 56 | Sidney Rusk | 40 | Head | Operator | Indiana |
| 57 | Edna Rusk | 40 | Wife | Stenographer | New Jersey |
| 58 | Elizabeth Mcguire | 62 | Mother | Postmistress | California |
| 59 | Everett Nelson | 36 | Head | Salesman | New Jersey |
| 60 | Jeanette Nelson | 30 | Wife | Trained Nurse | New Jersey |
| 61 | Janice Nelson | 2 | Daughter | — | New Jersey |
| 62 | Clinton L. Titus | 34 | Head | Chauffeur | New Jersey |
| 63 | Ella S. Titus | 29 | Wife | Bookkeeper | New Jersey |
| 64 | Gilbert Titus | 8 | Son | — | New Jersey |
| 65 | Thomas Kennedy | 36 | Head | Butcher | New Jersey |
| 66 | Ellen Kennedy | 30 | Wife | — | New Jersey |
| 67 | John Kennedy | 4 | Son | — | New Jersey |
| 68 | Joan Kennedy | 1 | Daughter | — | New Jersey |
| 69 | Elmer R. Docherty | 38 | Head | Bank Teller | New Jersey |
| 70 | Madeline Docherty | 37 | Wife | — | New Jersey |
| 71 | Jean Docherty | 4 | Son | — | New Jersey |
| 72 | William Daye | 34 | Head | Quota Clerk | Vermont |
| 73 | Camilla Daye | 32 | Wife | Supervisor | Maine |
| 74 | Jacqueline Daye | 12 | Daughter | — | Maine |
| 75 | William Jr. Daye | 11 | Son | — | Maine |
| 76 | John Lucas | 8 | Nephew | — | New York |
| 77 | Fred L. Daye | 70 | Father | — | Vermont |
| 78 | Frank Swartout | 30 | Head | Truck Driver | New Jersey |
| 79 | Anne Swartout | 30 | Wife | — | New Jersey |
| 80 | Robert L. Hatterley | 8 | Son | — | New Jersey |
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)