TM
Thomas Mcmahon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Thomas Mcmahon across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1868), then head of a 4-person household.
Age 72
b. ~1868
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | McMahon |
| Given Name | Thomas J. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Phila |
| 1935 Residence (County) | Philadelphia |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Phila |
| Est. Birth Year | ~1868 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Anna Sanders | Daughter | — | 40 | ~1900 |
| Elizabeth Mcmahon | Spouse | — | 70 | ~1870 |
| Elizabeth Sanders | Other | — | 18 | ~1922 |
| Thomas Mcmahon | Head | — | 72 | ~1868 |
Census Appearances
1920
Schuylkill, Pennsylvania
Head, age 52
Schuylkill, Pennsylvania · implied b. ~1868 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1885 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | manager |
| Industry | bleachery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Philadelphia, Pennsylvania
Head, age 62
Philadelphia, Pennsylvania · implied b. ~1868 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1886 |
| Age at First Marriage | 26 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Watchman |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Philadelphia-County, Pennsylvania
Head, age 72
Philadelphia-County, Pennsylvania · implied b. ~1868 — 4 household members
| Surname | McMahon |
| Given Name | Thomas J. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Phila |
| 1935 Residence (County) | Philadelphia |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Thomas Mcmahon across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Thomas Mcmahon
Head · 1940 · age 72 · b. ~1868 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03743-00421)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dorothy Woho | 15 | daughter | — | Penna |
| 42 | Thomas J. Mcmahon THIS PERSON | 72 | head | — | Scotland |
| 43 | Elizabeth B. Mcmahon | 70 | wife | — | Penna |
| 44 | Anna Sanders | 40 | daughter | — | Penna |
| 45 | Elizabeth Sanders | 18 | granddaughter | — | Penna |
| 46 | Elmer Reidm | 41 | head | Fireman | Penna |
| 47 | Florence Reidm | 37 | wife | — | Penna |
| 48 | Ethel Reidm | 19 | daughter | Newsworker | Penna |
| 49 | George Reidm | 15 | son | — | Penna |
| 50 | William Pietzsch | 60 | head | Salesman | Connecticut |
| 51 | Clara E. Pietzsch | 58 | wife | — | Germany |
| 52 | William M. Russ | 45 | brother-in-law | Clerk | Penna |
| 53 | Clara Wolf | 81 | mother-in-law | — | Germany |
| 54 | Hilda Clark | 52 | head | — | England |
| 55 | Edith Alma Clark | 30 | son | Hosier Knitter | Penna |
| 56 | Harry Moule | 53 | brother | Watchman | England |
| 57 | Clarence Hutchinson | 37 | son-in-law | Carpenter'S Helper | Penna |
| 58 | Edith Hutchinson | 35 | daughter | Shaper | Penna |
| 59 | Leroy Hutchinson | 13 | grandson | — | Penna |
| 60 | Gloria Hutchinson | 10 | granddaughter | — | Penna |
| 61 | George Huffman | 51 | head | Fireman | California |
| 62 | Ethel B. Huffman | 46 | wife | — | Penna |
| 63 | Robert Huffman | 27 | son | Clerk | Penna |
| 64 | Helen Huffman | 30 | daughter-in-law | — | Penna |
| 65 | Burton Huffman | 3 | granddaughter | — | Penna |
| 66 | William Hartdegen | 31 | head | Bookkeeper | Penna |
| 67 | Margaret Hartdegen | 30 | wife | — | Penna |
| 68 | Margaret Hartdegen | 5 | daughter | — | Penna |
| 69 | William Hartdegen | 6 | son | — | Penna |
| 70 | Joseph Hartdegen | 4 | son | — | Penna |
| 71 | Louis Hartdegen | 2 | son | — | Penna |
| 72 | Mary Hartdegen | 12 | daughter | — | Penna |
| 73 | Mary Hartdegen | 77 | mother | — | Germany |
| 74 | Emma E. Myers | 55 | head | Waitress | Penna |
| 75 | William Brooks | 49 | lodger | Electrician | Penna |
| 76 | George Weidman | 34 | head | Attendant Garage | Penna |
| 77 | Dorothy Weidman | 31 | wife | — | Penna |
| 78 | Harry Weidman | 14 | son | — | Penna |
| 79 | Gloria Weidman | 11 | daughter | — | Penna |
| 80 | Betty Weidman | 6 | daughter | — | Penna |
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)