MW
Mary Welsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Welsh across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 10-person household.
Age 38
b. ~1902
Female
Spouse
Born: Penna
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Penna |
| 1935 Residence (City) | Phila. |
| 1935 Residence (County) | Phila. |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Township / Ward | Phila |
| Est. Birth Year | ~1902 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| John Welsh | Head | — | 40 | ~1900 |
| Roger Welsh | Son | — | 4 | ~1936 |
| Mary Welsh | Daughter | — | 11 | ~1929 |
| Alice Welsh | Daughter | — | 8 | ~1932 |
| James Welsh | Son | — | 16 | ~1924 |
| Mary Welsh | Spouse | — | 38 | ~1902 |
| John Welsh | Son | — | 19 | ~1921 |
| William Welsh | Other | — | 66 | ~1874 |
| Joseph Welsh | Son | — | 14 | ~1926 |
| William Welsh | Son | — | 19 | ~1921 |
Census Appearances
1930
Philadelphia, Pennsylvania
Spouse, age 27
Philadelphia, Pennsylvania · implied b. ~1903 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Penna |
| Age at First Marriage | 17 |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Spouse, age 38
Philadelphia-County, Pennsylvania · implied b. ~1902 — 10 household members
| Surname | Welsh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Penna |
| 1935 Residence (City) | Phila. |
| 1935 Residence (County) | Phila. |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 Mary Welsh across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Welsh
Spouse · 1940 · age 38 · b. ~1902 · 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
39 people indexed on this census page (nara:1940:m-t0627-03735-00833)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Augustus Sherer | 41 | Head | Truck Driver | Penna |
| 42 | Anna Sherer | 30 | Wife | Parts Inspector | Penna |
| 43 | Edward Mcdermott | 52 | Head | Guard | Penna |
| 44 | Katherine Mcdermott | 47 | Wife | — | Penna |
| 45 | Anthony Madella | 24 | Head | Salesman | New Jersey |
| 46 | Adela Madella | 25 | Wife | — | Italy |
| 47 | Frank Madella | 2 | Son | — | Penna |
| 48 | Eleanor Kennealy | 39 | Head | Clerk | Penna |
| 49 | Marie Kennealy | 14 | Daughter | — | Penna |
| 50 | Eileen Kennealy | 10 | Daughter | — | Penna |
| 51 | Adolph Nachtrieb | 42 | Head | Machinist | Penna |
| 52 | Hazel Nachtrieb | 40 | Wife | — | Penna |
| 53 | Theodore Nachtrieb | 17 | Son | — | Penna |
| 54 | Evelyn Nachtrieb | 14 | Daughter | — | Penna |
| 55 | Eugene Nachtrieb | 12 | Son | — | New Jersey |
| 56 | Ernest Nachtrieb | 9 | Son | — | New Jersey |
| 57 | Marie Nachtrieb | 3 | Daughter | — | Maryland |
| 58 | Charles Barr | 39 | Head | Hauling Contractor | Penna |
| 59 | Clare Barr | 19 | Daughter | Truck Driver | Penna |
| 60 | John Welsh | 40 | Head | — | Penna |
| 61 | Mary Welsh THIS PERSON | 38 | Wife | — | Penna |
| 62 | John Welsh | 19 | Son | Apprentice | Penna |
| 63 | William Welsh | 19 | Son | New Worker | Penna |
| 64 | James Welsh | 16 | Son | — | Penna |
| 65 | Joseph Welsh | 14 | Son | — | Penna |
| 66 | Mary Welsh | 11 | Daughter | — | Penna |
| 67 | Alice Welsh | 8 | Daughter | — | Penna |
| 68 | Roger Welsh | 4 | Son | — | Penna |
| 69 | William Welsh | 66 | Father | Longshoreman | Penna |
| 71 | William J. Walsh | 47 | Head | Crane Operator | Penna |
| 72 | Catherine Walsh | 44 | Wife | Waitress | Penna |
| 73 | George Brandt | 26 | Son-in-law | Bartender | Penna |
| 74 | Catherine Brandt | 25 | Daughter | — | Penna |
| 75 | William Brandt | 7 | Grandson | — | Penna |
| 76 | Arlene Brandt | 2 | Granddaughter | — | Penna |
| 77 | Stanley Johnson | 31 | Head | Night Watchman | Virginia |
| 78 | Amy Johnson | 28 | Wife | — | Virginia |
| 79 | James W. Duckworth | 28 | Head | Painter | Louisiana |
| 80 | Mildred Duckworth | 23 | Wife | — | 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)